[ { "id": "https://authors.library.caltech.edu/records/y50jr-1vk15", "eprint_id": 2296, "eprint_status": "archive", "datestamp": "2023-08-21 22:47:00", "lastmod": "2023-10-13 23:18:48", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Busenitz-J", "name": { "family": "Busenitz", "given": "J." } }, { "id": "Cook-B", "name": { "family": "Cook", "given": "B." } }, { "id": "Gratta-G", "name": { "family": "Gratta", "given": "G." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H." } }, { "id": "Kornis-J", "name": { "family": "Kornis", "given": "J." } }, { "id": "Lawrence-D", "name": { "family": "Lawrence", "given": "D." } }, { "id": "Lee-K-B", "name": { "family": "Lee", "given": "K. B." } }, { "id": "McKinny-K", "name": { "family": "McKinny", "given": "K." } }, { "id": "Miller-L", "name": { "family": "Miller", "given": "L." } }, { "id": "Novikov-V", "name": { "family": "Novikov", "given": "V." } }, { "id": "Piepke-A", "name": { "family": "Piepke", "given": "A." } }, { "id": "Ritchie-B", "name": { "family": "Ritchie", "given": "B." } }, { "id": "Tracy-D", "name": { "family": "Tracy", "given": "D." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Wang-Y-F", "name": { "family": "Wang", "given": "Y.-F." } }, { "id": "Wolf-J", "name": { "family": "Wolf", "given": "J." } } ] }, "title": "Final results from the Palo Verde neutrino oscillation experiment", "ispublished": "pub", "full_text_status": "public", "note": "\u00a92001 The American Physical Society \n\nReceived 3 July 2001; published 5 November 2001 \n\nWe would like to thank the Arizona Public Service Company for the generous hospitality provided at the Palo Verde plant. The important contributions of M. Chen, R. Hertenberger, K. Lou, and N. Mascarenhas in the early stages of this project are gratefully acknowledged. We are indebted to J. Ball, B. Barish, R. Canny, M. Dugger, A. Godber, J. Hanson, D. Michael, C. Peck, C. Roat, N. Tolich, A. Vital, and J. Winterton for their help. We also acknowledge the generous financial help from the University of Alabama, Arizona State University, California Institute of Technology, and Stanford University. Finally, our gratitude goes to CERN, DESY, Fermilab, LANL, LLNL, SLAC, and TJNAF, who at different times provided us with parts and equipment needed for the experiment. This project was supported in part by the Department of Energy and the National Science Foundation. One of us (J.K.) received support from the Hungarian OTKA fund, and another (L.M.) from the ARCS Foundation.\n\n
Published - BOEprd01.pdf
", "abstract": "The analysis and results are presented from the complete data set recorded at Palo Verde between September 1998 and July 2000. In the experiment, the \u03bd\u0305e interaction rate has been measured at a distance of 750 and 890 m from the reactors of the Palo Verde Nuclear Generating Station for a total of 350 days, including 108 days with one of the three reactors off for refueling. Backgrounds were determined by (a) the swap technique based on the difference between signal and background under reversal of the positron and neutron parts of the correlated event, and (b) making use of the conventional reactor-on and reactor-off cycles. There is no evidence for neutrino oscillation and the mode \u03bd\u0305e\u2192\u03bd\u0305x was excluded at 90% C.L. for \u0394m2>1.1\u00d710-3\u2002eV2 at full mixing, and sin22\u03b8>0.17 at large \u0394m2.", "date": "2001-12-01", "date_type": "published", "publication": "Physical Review D", "volume": "64", "number": "11", "publisher": "Physical Review D", "pagerange": "Art. No. 112001", "id_number": "CaltechAUTHORS:BOEprd01", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEprd01", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevD.64.112001", "primary_object": { "basename": "BOEprd01.pdf", "url": "https://authors.library.caltech.edu/records/y50jr-1vk15/files/BOEprd01.pdf" }, "resource_type": "article", "pub_year": "2001", "author_list": "Boehm, F.; Busenitz, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/hfzxm-xsz02", "eprint_id": 2907, "eprint_status": "archive", "datestamp": "2023-08-21 21:42:20", "lastmod": "2023-10-13 23:48:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Busenitz-J", "name": { "family": "Busenitz", "given": "J." } }, { "id": "Cook-B", "name": { "family": "Cook", "given": "B." } }, { "id": "Gratta-G", "name": { "family": "Gratta", "given": "G." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H." } }, { "id": "Kornis-J", "name": { "family": "Kornis", "given": "J." } }, { "id": "Lawrence-D", "name": { "family": "Lawrence", "given": "D." } }, { "id": "Lee-K-B", "name": { "family": "Lee", "given": "K. B." } }, { "id": "McKinny-K", "name": { "family": "McKinny", "given": "K." } }, { "id": "Miller-L", "name": { "family": "Miller", "given": "L." } }, { "id": "Novikov-V", "name": { "family": "Novikov", "given": "V." } }, { "id": "Piepke-A", "name": { "family": "Piepke", "given": "A." } }, { "id": "Ritchie-B", "name": { "family": "Ritchie", "given": "B." } }, { "id": "Tracy-D", "name": { "family": "Tracy", "given": "D." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Wang-Y-F", "name": { "family": "Wang", "given": "Y.-F." } }, { "id": "Wolf-J", "name": { "family": "Wolf", "given": "J." } } ] }, "title": "Neutron production by cosmic-ray muons at shallow depth", "ispublished": "pub", "full_text_status": "public", "note": "\u00a92000 The American Physical Society \n\nReceived 23 June 2000; published 12 October 2000 \n\nWe would like to thank the Arizona Public Service Company for the generous hospitality provided at the Palo Verde plant. The important contributions of M. Chen, R. Hertenberger, K. Lou, and N. Mascarenhas in the early stages of this project are gratefully acknowledged. We also acknowledge generous financial help from the University of Alabama, Arizona State University, California Institute of Technology, and Stanford University. Finally, our gratitude goes to CERN, DESY, Fermilab, LANL, LLNL, SLAC, and TJNAF who at different times provided us with parts and equipment needed for the experiment. This project was supported in part by the U.S. DOE.\n\nPublished - BOEprd00b.pdf
", "abstract": "The yield of neutrons produced by cosmic ray muons at a shallow depth of 32 meters of water equivalent has been measured. The Palo Verde neutrino detector, containing 11.3 tons of Gd loaded liquid scintillator and 3.5 tons of acrylic, served as a target. The rate of one and two neutron captures was determined. Modeling the neutron capture efficiency allowed us to deduce the total yield of neutrons, Ytot=(3.60\u00b10.09\u00b10.31)\u00d710^-5 neutrons per muon and g/cm^2. This yield is consistent with previous measurements at similar depths.", "date": "2000-11-01", "date_type": "published", "publication": "Physical Review D", "volume": "62", "number": "9", "publisher": "Physical Review D", "pagerange": "Art. No. 092005", "id_number": "CaltechAUTHORS:BOEprb00b", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEprb00b", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "corp_creators": { "items": [ "Palo-Verde Collaboration" ] }, "doi": "10.1103/PhysRevD.62.092005", "primary_object": { "basename": "BOEprd00b.pdf", "url": "https://authors.library.caltech.edu/records/hfzxm-xsz02/files/BOEprd00b.pdf" }, "resource_type": "article", "pub_year": "2000", "author_list": "Boehm, F.; Busenitz, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/gthtc-g2c73", "eprint_id": 2906, "eprint_status": "archive", "datestamp": "2023-08-21 21:38:05", "lastmod": "2023-10-13 23:48:14", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Busenitz-J", "name": { "family": "Busenitz", "given": "J." } }, { "id": "Cook-B", "name": { "family": "Cook", "given": "B." } }, { "id": "Gratta-G", "name": { "family": "Gratta", "given": "G." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H." } }, { "id": "Kornis-J", "name": { "family": "Kornis", "given": "J." } }, { "id": "Lawrence-D", "name": { "family": "Lawrence", "given": "D." } }, { "id": "Lee-K-B", "name": { "family": "Lee", "given": "K. B." } }, { "id": "McKinny-K", "name": { "family": "McKinny", "given": "K." } }, { "id": "Miller-L", "name": { "family": "Miller", "given": "L." } }, { "id": "Novikov-V", "name": { "family": "Novikov", "given": "V." } }, { "id": "Piepke-A", "name": { "family": "Piepke", "given": "A." } }, { "id": "Ritchie-B", "name": { "family": "Ritchie", "given": "B." } }, { "id": "Tracy-D", "name": { "family": "Tracy", "given": "D." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Wang-Y-F", "name": { "family": "Wang", "given": "Y.-F." } }, { "id": "Wolf-J", "name": { "family": "Wolf", "given": "J." } } ] }, "title": "Results from the Palo Verde neutrino oscillation experiment", "ispublished": "pub", "full_text_status": "public", "note": "\u00a92000 The American Physical Society \n\nReceived 16 March 2000; published 7 September 2000 \n\nWe would like to thank the Arizona Public Service Company for the generous hospitality provided at the Palo Verde plant. The important contributions of M. Chen, R. Hertenberger, K. Lou, and N. Mascarenhas in the early stages of this project are gratefully acknowledged. We thank K. Scholberg for illuminating discussions on the Super-Kamiokande three flavor analysis. We are indebted to J. Ball, B. Barish, R. Canny, A. Godber, J. Hanson, D. Michael, C. Peck, C. Roat, N. Tolich, and A. Vital for their help. We also acknowledge the generous financial help from the University of Alabama, Arizona State University, California Institute of Technology, and Stanford University. Finally, our gratitude goes to CERN, DESY, Fermilab, LANL, LLNL, SLAC, and TJNAF who at different times provided us with parts and equipment needed for the experiment. This project was supported in part by the Department of Energy. One of us (J.K.) received support from the Hungarian OTKA fund and another (L.M.) from the ARCS Foundation.\n\nPublished - BOEprd00a.pdf
", "abstract": "The \u03bd\u0305e flux and spectrum have been measured at a distance of about 800 m from the reactors of the Palo Verde Nuclear Generating Station using a segmented Gd-loaded liquid scintillator detector. Correlated positron-neutron events from the reaction \u03bd\u0305ep\u2192e+n were recorded for a period of 200 d including 55 d with one of the three reactors off for refueling. Backgrounds were accounted for by making use of the reactor-on and reactor-off cycles, and also with a novel technique based on the difference between signal and background under reversal of the e+ and n portions of the events. A detailed description of the detector calibration, background subtraction, and data analysis is presented here. Results from the experiment show no evidence for neutrino oscillations. \u03bd\u0305e\u2192\u03bd\u0305x oscillations were excluded at 90% C.L. for \u0394m2>1.12\u00d710-3 eV2 for full mixing and sin22\u03b8>0.21 for large \u0394m2. These results support the conclusion that the observed atmospheric neutrino oscillations do not involve \u03bde.", "date": "2000-10-01", "date_type": "published", "publication": "Physical Review D", "volume": "62", "number": "7", "publisher": "Physical Review D", "pagerange": "Art. No. 072002", "id_number": "CaltechAUTHORS:BOEprb00a", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEprb00a", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevD.62.072002", "primary_object": { "basename": "BOEprd00a.pdf", "url": "https://authors.library.caltech.edu/records/gthtc-g2c73/files/BOEprd00a.pdf" }, "resource_type": "article", "pub_year": "2000", "author_list": "Boehm, F.; Busenitz, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/f0pjw-pky24", "eprint_id": 2089, "eprint_status": "archive", "datestamp": "2023-08-21 21:07:16", "lastmod": "2023-10-13 23:11:47", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Busenitz-J", "name": { "family": "Busenitz", "given": "J." } }, { "id": "Cook-B", "name": { "family": "Cook", "given": "B." } }, { "id": "Gratta-G", "name": { "family": "Gratta", "given": "G." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H." } }, { "id": "Kornis-J", "name": { "family": "Kornis", "given": "J." } }, { "id": "Lawrence-D", "name": { "family": "Lawrence", "given": "D." } }, { "id": "Lee-K-B", "name": { "family": "Lee", "given": "K. B." } }, { "id": "McKinny-K", "name": { "family": "McKinny", "given": "K." } }, { "id": "Miller-L", "name": { "family": "Miller", "given": "L." } }, { "id": "Novikov-V", "name": { "family": "Novikov", "given": "V." } }, { "id": "Piepke-A", "name": { "family": "Piepke", "given": "A." } }, { "id": "Ritchie-B", "name": { "family": "Ritchie", "given": "B." } }, { "id": "Tracy-D", "name": { "family": "Tracy", "given": "D." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Wang-Y-F", "name": { "family": "Wang", "given": "Y.-F." } }, { "id": "Wolf-J", "name": { "family": "Wolf", "given": "J." } } ] }, "title": "Search for neutrino oscillations at the Palo Verde nuclear reactors", "ispublished": "pub", "full_text_status": "public", "note": "\u00a92000 The American Physical Society. \n\nReceived 22 December 1999. \n\nWe thank the Arizona Public Service Company for the generous hospitality at the Palo Verde plant. The important contributions of M. Chen, R. Hertenberger, K. Lou, and N. Mascarenhas in the early stages of this project are gratefully acknowledged. We are indebted to J. F. Beacom, B. Barish, R. Canny, A. Godber, J. Hanson, D. Michael, C. Peck, C. Roat, N. Tolich, and A. Vital for their help. We also acknowledge the generous financial help from the University of Alabama, Arizona State University, Caltech, and Stanford University. Finally our gratitude goes to CERN, DESY, FNAL, LANL, LLNL, SLAC, and TJNAF which at different times provided us with parts and equipment for the experiment. This project was supported in part by the U.S. DoE. One of us (J.K.) received support from the Hungarian OTKA fund and another (L.M.) from the ARCS foundation.\n\nPublished - BOEprl00.pdf
", "abstract": "We report on the initial results from a measurement of the antineutrino flux and spectrum at a distance of about 800 m from the three reactors of the Pale Verde Nuclear Generating Station using a segmented gadolinium-loaded scintillation detector. We find that the antineutrino flux agrees with that predicted in the absence of oscillations excluding at 90% C.L. <(nu)over bar>(e)-<(nu)over bar>(x) oscillations with Delta m(2) > 1.12 x 10(-3) eV(2) for maximal mixing and sin(2)2 theta > 0.21 for large Delta m(2). Our results support the conclusion that the atmospheric neutrino oscillations observed by Super-Kamiokande do not involve nu(e).", "date": "2000-04-24", "date_type": "published", "publication": "Physical Review Letters", "volume": "84", "number": "17", "publisher": "American Physical Society", "pagerange": "3764-3767", "id_number": "CaltechAUTHORS:BOEprl00", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEprl00", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevLett.84.3764", "primary_object": { "basename": "BOEprl00.pdf", "url": "https://authors.library.caltech.edu/records/f0pjw-pky24/files/BOEprl00.pdf" }, "resource_type": "article", "pub_year": "2000", "author_list": "Boehm, F.; Busenitz, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/7qgty-j3946", "eprint_id": 1982, "eprint_status": "archive", "datestamp": "2023-08-22 09:30:17", "lastmod": "2023-10-13 23:07:34", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vuilleumier-J-C", "name": { "family": "Vuilleumier", "given": "J.-C." } }, { "id": "Busto-J", "name": { "family": "Busto", "given": "J." } }, { "id": "Farine-J", "name": { "family": "Farine", "given": "J." } }, { "id": "J\u00f6rgens-V", "name": { "family": "J\u00f6rgens", "given": "V." } }, { "id": "Mitchell-L-W", "name": { "family": "Mitchell", "given": "L. W." } }, { "id": "Treichel-M", "name": { "family": "Treichel", "given": "M." } }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J.-L." } }, { "id": "Wong-H-T", "name": { "family": "Wong", "given": "H. T." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Fisher-P", "name": { "family": "Fisher", "given": "P." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Imel-D-A", "name": { "family": "Imel", "given": "D. A." }, "orcid": "0000-0002-6118-7396" }, { "id": "Iqbal-M-Z", "name": { "family": "Iqbal", "given": "M. Z." } }, { "id": "O'Callaghan-Hay-B-M", "name": { "family": "O'Callaghan-Hay", "given": "B. M." } }, { "id": "Thomas-J", "name": { "family": "Thomas", "given": "J." } }, { "id": "Gabathuler-K", "name": { "family": "Gabathuler", "given": "K." } } ] }, "title": "Search for neutrinoless double-beta decay in 136-Xe with a time projection chamber", "ispublished": "pub", "full_text_status": "public", "keywords": "BROKEN LEPTON NUMBER; RATES; GE-76; TPC", "note": "\u00a91993 The American Physical Society. \n\nReceived 8 March 1993. \n\nThe authors would like to thank Petr Vogel for numerous stimulating discussions, as well as technical staff of the Institut de Physique of Neuchatel and of the Paul Scherrer Institute for assistance. This work was supported by the U.S. Department of Energy and the Fonds National Suisse pour la Recherde Scientifique.", "abstract": "A xenon time projection chamber (TPC) with an active volume of 180 liters has been built to study neutrinoless double-beta decay in Xe-136. The experiment was performed in the Gotthard Underground Laboratory, with 5 atm of xenon enriched to 62.5% in Xe-136. The experimental details, background considerations, detector performance, and data analysis are discussed. From 6830 h of data, no evidence has been found for the 0nu 0+-->0+ transition. Half-life limits of T1/2(0nu) > 3.4(6.4) X 10^(23) yr in the mass mechanism mode, and T1/2(0nu) > 2.6(4.9) X 10^23 yr in the right-handed currents mode, at the 90(68)% C.L., were derived, corresponding to an upper limit on the Majorana neutrino mass parameter [m(nu)] of about 2.8 eV. Limits on two-neutrino double-beta decay of T1/2(2nu) /2 > 2. 1 X 10^(20) yr, and on neutrinoless double-beta decay with Majoron emission of T1/2(0nuchi) > 4.9 X 10^(21) yr, both at 90% C.L., were also derived. Accordingly, a limit on the effective Majoron-neutrino coupling parameter of [g(M)] < 2.4 X 10^(-4) was deduced.", "date": "1993-08-01", "date_type": "published", "publication": "Physical Review D", "volume": "48", "number": "3", "publisher": "Physical Review D", "pagerange": "1009-1020", "id_number": "CaltechAUTHORS:VUIprd93", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:VUIprd93", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevD.48.1009", "primary_object": { "basename": "VUIprd93.pdf", "url": "https://authors.library.caltech.edu/records/7qgty-j3946/files/VUIprd93.pdf" }, "resource_type": "article", "pub_year": "1993", "author_list": "Vuilleumier, J.-C.; Busto, J.; et el." }, { "id": "https://authors.library.caltech.edu/records/qsndw-xxy71", "eprint_id": 8675, "eprint_status": "archive", "datestamp": "2023-08-22 09:05:10", "lastmod": "2023-10-16 21:38:35", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Chen-M", "name": { "family": "Chen", "given": "M." } }, { "id": "Imel-D-A", "name": { "family": "Imel", "given": "D. A." }, "orcid": "0000-0002-6118-7396" }, { "id": "Radcliffe-T-J", "name": { "family": "Radcliffe", "given": "T. J." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "New limits on the 17 keV neutrino", "ispublished": "pub", "full_text_status": "public", "keywords": "BETA-DECAY; HEAVY NEUTRINOS; 17-KEV NEUTRINO; SEARCH; S-35; SPECTRUM; EMISSION", "note": "\u00a91992 The American Physical Society. \n\nReceived 20 July 1992. \n\nWe wish to thank Petr Vogel for generous advice throughout this work. The help of H.-W. Becker, V. Novikov, and A. Young is gratefully acknowledged. The research was supported by the Department of Energy under Grant No. DE-FG03-88ER40397.", "abstract": "We present results of new measurements of the \u03b2 spectrum of 35S, using the Caltech double-focusing, iron-free \u03b2 spectrometer. Our data show no evidence for a heavy neutrino with a mass between 12 and 22 keV admixed to the usual light neutrino. In particular, we rule out, at the 6\u03c3 level, a 17 keV neutrino admixed at 0.85%, and give an upper limit (90% C.L.) of 0.2% for such a neutrino admixture. To demonstrate that our experiment is sensitive to spectral features such as those from heavy neutrinos we have induced an artificial kink by means of an absorber foil covering part of the source.", "date": "1992-11-15", "date_type": "published", "publication": "Physical Review Letters", "volume": "69", "number": "22", "publisher": "American Physical Society", "pagerange": "3151-3154", "id_number": "CaltechAUTHORS:CHEprl92", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:CHEprl92", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevLett.69.3151", "primary_object": { "basename": "CHEprl92.pdf", "url": "https://authors.library.caltech.edu/records/qsndw-xxy71/files/CHEprl92.pdf" }, "resource_type": "article", "pub_year": "1992", "author_list": "Chen, M.; Imel, D. A.; et el." }, { "id": "https://authors.library.caltech.edu/records/ckww6-44t13", "eprint_id": 3732, "eprint_status": "archive", "datestamp": "2023-08-22 08:47:39", "lastmod": "2023-10-16 16:07:59", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Reusser-D", "name": { "family": "Reusser", "given": "D." } }, { "id": "Treichel-M", "name": { "family": "Treichel", "given": "M." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Fisher-P", "name": { "family": "Fisher", "given": "P." } }, { "id": "Gabathuler-K", "name": { "family": "Gabathuler", "given": "K." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "J\u00f6rgens-V", "name": { "family": "J\u00f6rgens", "given": "V." } }, { "id": "Mitchell-L-W", "name": { "family": "Mitchell", "given": "L. W." } }, { "id": "Nussbaum-C", "name": { "family": "Nussbaum", "given": "C." } }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J.-L." } } ] }, "title": "Final report on the search for neutrinoless double-\u03b2 decay of 76Ge from the Gotthard underground experiment", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91992 The American Physical Society. \n\nReceived 11 October 1991. \n\nThe authors would like to thank P. Vogel for many stimulating discussions. This work was supported by the U.S. Department of Energy and the Fonds National Suisse pour la Recherche Scientifique.", "abstract": "We report here on the final results of a search for Ge-76 double-beta decay conducted in the Gotthard underground laboratory. The detector consists of an array of eight high-purity natural germanium crystals totaling 1095 cm^3 fiducial volume. The accumulated data set represents a sensitivity of 10.0 kg yr. No indication of neutrinoless double-beta decay was found. The measured half-life limits are T1/2(0+ --> 0+) > 6.0(3.3) x 10^(23) yr for the transition to the ground state and T1/2(0+ --> 2+) > 1.4(0.65) x 10^(23) yr for the transition to the first excited state at 68% (90%) C.L. From these results we derive an upper limit for the Majorana mass of the neutrino in the range of 1.8 to 6.7 eV depending on matrix-element calculations. The same results allow limits to be set for the right-handed-current parameters: < 3.6 x 10^(-6) and < 2.2 x 10^(-8).", "date": "1992-04-01", "date_type": "published", "publication": "Physical Review D", "volume": "45", "number": "7", "publisher": "Physical Review D", "pagerange": "2548-2551", "id_number": "CaltechAUTHORS:REUprd92", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:REUprd92", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevD.45.2548", "primary_object": { "basename": "REUprd92.pdf", "url": "https://authors.library.caltech.edu/records/ckww6-44t13/files/REUprd92.pdf" }, "resource_type": "article", "pub_year": "1992", "author_list": "Reusser, D.; Treichel, M.; et el." }, { "id": "https://authors.library.caltech.edu/records/czac4-jhc79", "eprint_id": 30280, "eprint_status": "archive", "datestamp": "2023-08-20 00:24:15", "lastmod": "2023-10-17 15:37:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wong-H-T", "name": { "family": "Wong", "given": "H. T." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Fisher-P", "name": { "family": "Fisher", "given": "P." } }, { "id": "Gabathuler-K", "name": { "family": "Gabathuler", "given": "K." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Imel-D-A", "name": { "family": "Imel", "given": "D. A." }, "orcid": "0000-0002-6118-7396" }, { "id": "Iqbal-M-Z", "name": { "family": "Iqbal", "given": "M. Z." } }, { "id": "J\u00f6rgens-V", "name": { "family": "J\u00f6rgens", "given": "V." } }, { "id": "Mitchell-L-W", "name": { "family": "Mitchell", "given": "L. W." } }, { "id": "O'Callaghan-Hay-B-M", "name": { "family": "O'Callaghan-Hay", "given": "B. M." } }, { "id": "Thomas-J", "name": { "family": "Thomas", "given": "J." } }, { "id": "Treichel-M", "name": { "family": "Treichel", "given": "M." } }, { "id": "Vuilleumier-J-C", "name": { "family": "Vuilleumier", "given": "J.-C." } }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J.-L." } } ] }, "title": "New limit on neutrinoless double \u03b2 decay in ^(136)Xe with a time projection chamber", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1991 American Physical Society.\n\nReceived 5 August 1991; published in the issue dated 2 September 1991.\n\nThe authors would like to thank Petr Vogel for many\ncontributions and discussions, Val Telegdi for stimulating\ncomments, and J.-P. Bourquin, C. Heche, D. Schenker,\nand the technical staff from Institut de PhysiqueNeuchiitel\nand Paul Scherrer Institute for assistance.\nThis work is supported by the U.S. Department of Energy and the Fonds National Suisse pour Ia Recherche Scientifique.\n\nPublished - WONprl91.pdf
", "abstract": "A xenon time projection chamber with an active volume of 207 L has been built to study neutrinoless double \u03b2 decay in ^(136)Xe. Data were taken in the Gotthard Underground Laboratory, with 5 atm of xenon enriched to 62.5% in ^(136)Xe. From 3380 h of data, no evidence has been found for the 0\u03bd 0^(+)\u21920^(+) transition. Half-life limits of T_(1/2)^(0\u03bd)>2.5(4.9)\u00d710^(23) yr in the mass-mechanism mode and T_(1/2)^(0\u03bd)>1.7(3.2)\u00d710^(23) yr in the right-handed-current mode, at the 90(68)% C.L., were derived. An upper limit for the Majorana neutrino mass parameter was deduced.", "date": "1991-09-02", "date_type": "published", "publication": "Physical Review Letters", "volume": "67", "number": "10", "publisher": "American Physical Society", "pagerange": "1218-1221", "id_number": "CaltechAUTHORS:20120424-110541025", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120424-110541025", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Department of Energy (DOE)" }, { "agency": "Fonds National Suisse pour Ia Recherche Scientifique" } ] }, "doi": "10.1103/PhysRevLett.67.1218", "primary_object": { "basename": "WONprl91.pdf", "url": "https://authors.library.caltech.edu/records/czac4-jhc79/files/WONprl91.pdf" }, "resource_type": "article", "pub_year": "1991", "author_list": "Wong, H. T.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/ts485-sz529", "eprint_id": 6262, "eprint_status": "archive", "datestamp": "2023-08-22 05:02:00", "lastmod": "2023-10-16 20:13:05", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Zacek-G", "name": { "family": "Zacek", "given": "G." } }, { "id": "Feilitzsch-F-v", "name": { "family": "Feilitzsch", "given": "F. v." } }, { "id": "M\u00f6ssbauer-R-L", "name": { "family": "M\u00f6ssbauer", "given": "R. L." } }, { "id": "Oberauer-L", "name": { "family": "Oberauer", "given": "L." } }, { "id": "Zacek-V", "name": { "family": "Zacek", "given": "V." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Fisher-P-H", "name": { "family": "Fisher", "given": "P. H." } }, { "id": "Gimlett-J-L", "name": { "family": "Gimlett", "given": "J. L." } }, { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Kwon-H", "name": { "family": "Kwon", "given": "H." } }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J. L." } }, { "id": "Gabathuler-K", "name": { "family": "Gabathuler", "given": "K." } } ] }, "title": "Neutrino-oscillation experiments at the G\u00f6sgen nuclear power reactor", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91986 The American Physical Society \n\nReceived 3 April 1986 \n\nWe would like to thank the Aare-Tesin Elektrizit\u00e4t and the Kernkraftwerk G\u00f6sgen-D\u00e4niken AG for their continuous hospitality. G. Meier and W. Sauser have provided us with the necessary reactor data. Contributions from J. Langhans, E. Baumann, and R. Portmann are gratefully acknowledged. Discussions with P. Vogel and K. Schreckenbach were much appreciated. Early contributions of J. Egger, L. Meier, F. Pozar, and P. Tosolini are appreciated. The hospitality of the CERN EP Division is much appreciated. Financial support was obtained from the U.S. Department of Energy and from the Bundesministerium f\u00fcr Forschung und Technolgie of the Federal Republic of Germany.", "abstract": "A search for neutrino oscillations has been conducted at the 2800-MW (thermal) nuclear power reactor in G\u00f6sgen (Switzerland), providing 5\u00d710^20 electron antineutrinos per second. The energy spectrum of the antineutrinos was measured at three distances, 37.9, 45.9, and 64.7 m, from the reactor core. The detection of the neutrinos is based on the reaction \u03bd\u00afe+p\u2192e++n. Roughly 10^4 antineutrinos were registered at each of the three measuring positions. The measured spectra are analyzed in terms of a two-neutrino oscillation model and the results are represented as exclusion plots for the oscillation parameters \u0394m^2 and sin^2(2theta). Two analyses are performed: Analysis A relies exclusively on the data measured at the three different distances; analysis B combines the measured data with additional information, in particular with the reactor antineutrino spectrum as derived from independent \u03b2-spectroscopic measurements. Both analyses show that the data are consistent with the absence of neutrino oscillations, and rule out large regions of parameters (\u0394m2,theta). The resulting limits on the oscillation parameters are \u0394m^2<0.019 eV^2 (90% C.L.) for maximum mixing and sin^2(2theta)<0.21 (90% C.L.) for \u0394m^2>5 eV^2.", "date": "1986-11-01", "date_type": "published", "publication": "Physical Review D", "volume": "34", "number": "9", "publisher": "Physical Review D", "pagerange": "2621-2636", "id_number": "CaltechAUTHORS:ZACprd86", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:ZACprd86", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevD.34.2621", "primary_object": { "basename": "ZACprd86.pdf", "url": "https://authors.library.caltech.edu/records/ts485-sz529/files/ZACprd86.pdf" }, "resource_type": "article", "pub_year": "1986", "author_list": "Zacek, G.; Feilitzsch, F. v.; et el." }, { "id": "https://authors.library.caltech.edu/records/v4r7h-kx614", "eprint_id": 3603, "eprint_status": "archive", "datestamp": "2023-08-22 04:34:29", "lastmod": "2023-10-16 16:02:42", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Markey-J", "name": { "family": "Markey", "given": "J." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Search for admixture of heavy neutrinos with masses between 5 and 55 keV", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91985 The American Physical Society. \n\nReceived 10 September 1985. \n\nWe wish to thank Petr Vogel for many discussions and important criticism. Herb Hendrikson's ingenious help to get the spectrometer back into operation is much appreciated. This work is supported by the U.S. Department of Energy Contract No. DEAT-0381-ER40002.", "abstract": "Using a magnetic spectrometer at a momentum resolution of 0.3%, we have studied the beta spectrum from 35S. We do not see evidence for the admixture of a heavy neutrino to the usual light (m~0) \u03bd\u0303e accompanying beta decay, in the mass range between 5 and 50 keV, with a limit for the mixing strength of |U|2<3\u00d710^(-3) (90% confidence limit).", "date": "1985-12-01", "date_type": "published", "publication": "Physical Review C", "volume": "32", "number": "6", "publisher": "Physical Review C", "pagerange": "2215-2216", "id_number": "CaltechAUTHORS:MARprc85", "issn": "0556-2813", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MARprc85", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevC.32.2215", "primary_object": { "basename": "MARprc85.pdf", "url": "https://authors.library.caltech.edu/records/v4r7h-kx614/files/MARprc85.pdf" }, "resource_type": "article", "pub_year": "1985", "author_list": "Markey, J. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/qs3sr-3gw50", "eprint_id": 716, "eprint_status": "archive", "datestamp": "2023-08-22 04:10:06", "lastmod": "2023-10-13 21:56:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" } ] }, "title": "Low-energy neutrino physics and neutrino mass", "ispublished": "pub", "full_text_status": "public", "note": "\"Reprinted, with permission, from the Annual Review of Nuclear and Particle Science, Volume 34 copyright 1984 by Annual Reviews, www.annualreviews.org\"\n\nThis review was initiated at the Aspen Center for Physics; its hospitality and stimulating atmosphere are appreciated. Enlightening discussions with V. L. Telegdi are gratefully acknowledged. The work was supported by the US Department of Energy under Contract DEAT-03-81ER40002.", "abstract": "Among the principal concerns in neutrino physics today are the questions of whether neutrinos are massive and, if so, whether the neutrinos emitted in a weak decay are pure or mixed quantum states. The concept of mixed neutrinos has been with us for more than 20 years, having first been introduced by Maki et al (1) and by Pontecorvo (2) following demonstration in 1962 that more than one type (flavor) of neutrino existed. After having been dormant for some time, the interest in these issues was reborn in recent years with the advent of grand unified theories, which predict nonvanishing neutrino mass and which can accommodate eutrino mixing, in a natural way. Controversial experiments also refueled the excitment (and consternation) of researchers in this endeavor.", "date": "1984-12-01", "date_type": "published", "publication": "Annual Review of Nuclear and Particle Science", "volume": "34", "publisher": "Annual Review of Nuclear and Particle Science", "pagerange": "125-153", "id_number": "CaltechAUTHORS:BOEarnps84", "issn": "0163-8998", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEarnps84", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1146/annurev.ns.34.120184.001013", "primary_object": { "basename": "BOEarnps84.pdf", "url": "https://authors.library.caltech.edu/records/qs3sr-3gw50/files/BOEarnps84.pdf" }, "resource_type": "article", "pub_year": "1984", "author_list": "Boehm, F. and Vogel, P." }, { "id": "https://authors.library.caltech.edu/records/r15rx-5k291", "eprint_id": 9893, "eprint_status": "archive", "datestamp": "2023-08-22 03:41:40", "lastmod": "2023-10-16 22:33:05", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Forster-A", "name": { "family": "Forster", "given": "A." } }, { "id": "Bovet-E", "name": { "family": "Bovet", "given": "E." } }, { "id": "Gimlett-J-L", "name": { "family": "Gimlett", "given": "J." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Murray-D", "name": { "family": "Murray", "given": "D." } }, { "id": "Powers-R-J", "name": { "family": "Powers", "given": "R. J." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Kunselman-A-R", "name": { "family": "Kunselman", "given": "R." } }, { "id": "Lee-P-L", "name": { "family": "Lee", "given": "P. L." } } ] }, "title": "Determination of the 2p-1s transition energy and strong interaction shift in pionic hydrogen using crystal diffraction", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91983 The American Physical Society. \n\nReceived 29 July 1983. \n\nThanks are due to the staff of LAMPF for generous technical support and assistance. The help of J. Markey during the experiment is gratefully acknowledged. One of us (A.F.) wishes to thank Alexander von Humboldt Foundation for financial support. This work was supported by the US DOE under Contract No. DEAT-0381-ER40002.", "abstract": "The 2p-1s atomic transition in pionic hydrogen has been studied with the help of a point-focusing graphite diffraction spectrometer. The transition energy was measured to be E(2p-1s)=2433.5\u00b11.7 eV. From this result a strong interaction shift of -3.9\u00b11.7 eV was derived. The K\u03b1 x-ray yield in the 2.7 atm hydrogen target at 40 K was found to be 0.025\u00b10.013 per stopped pion.", "date": "1983-12-01", "date_type": "published", "publication": "Physical Review C", "volume": "28", "number": "6", "publisher": "Physical Review C", "pagerange": "2374-2379", "id_number": "CaltechAUTHORS:FORprc83", "issn": "0556-2813", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:FORprc83", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevC.28.2374", "primary_object": { "basename": "FORprc83.pdf", "url": "https://authors.library.caltech.edu/records/r15rx-5k291/files/FORprc83.pdf" }, "resource_type": "article", "pub_year": "1983", "author_list": "Forster, A.; Bovet, E.; et el." }, { "id": "https://authors.library.caltech.edu/records/x7cva-gjv64", "eprint_id": 6359, "eprint_status": "archive", "datestamp": "2023-08-22 03:07:26", "lastmod": "2023-10-16 20:17:20", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Markey-J", "name": { "family": "Markey", "given": "J." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Fermi\u2014Gamow-Teller interference in 56Co decay", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91982 The American Physical Society \n\nReceived 25 January 1982 \n\nWe wish to acknowledge the help of K. Bachmann, E. Bovet, J. Gimlett, H. Henrikson, and D. Murray. Thanks are due to P. Vogel for many illuminating discussions. This work was supported by the U.S. Department of Energy under Contract No. DEAT-0381ER40002.", "abstract": "A measurement of the circular polarization of the \u03b3 rays following the \u03b2 decay of 56Co reveals an anisotropy coefficient of A=0.017(13). A Fermi to Gamow-Teller ratio, MFCV/MGTCA=-0.13(2), was derived demonstrating a sizable interference between the two amplitudes.", "date": "1982-07-01", "date_type": "published", "publication": "Physical Review C", "volume": "26", "number": "1", "publisher": "Physical Review C", "pagerange": "287-289", "id_number": "CaltechAUTHORS:MARprc82", "issn": "0556-2813", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MARprc82", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevC.26.287", "primary_object": { "basename": "MARprc82.pdf", "url": "https://authors.library.caltech.edu/records/x7cva-gjv64/files/MARprc82.pdf" }, "resource_type": "article", "pub_year": "1982", "author_list": "Markey, J. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/y8cg0-s5c73", "eprint_id": 7292, "eprint_status": "archive", "datestamp": "2023-08-22 02:59:42", "lastmod": "2023-10-16 20:49:19", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gimlett-J-L", "name": { "family": "Gimlett", "given": "J. L." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Lerner-J", "name": { "family": "Lerner", "given": "J." } } ] }, "title": "Test of time-reversal invariance in 131Xe", "ispublished": "pub", "full_text_status": "public", "keywords": "RADIOACTIVITY 131Xe; measured linear polarization of 364 keV \u03b3 from polarized nuclei, time-reversal test; deduced relative phase of E2, M1.", "note": "\u00a91982 The American Physical Society. \n\nReceived 3 August 1981. \n\nWe wish to acknowledge the assistance of N.H. Kwong and E. Redden with the experiment. Thanks are due to P. Herczeg and P. Vogel for many helpful discussions. This work was supported by the U.S. Department of Energy under Contract No. DE-AT03-81-ER40002.", "abstract": "An experiment has been performed to test the time-reversal symmetry in the emission of the mixed E2 and M1 364 keV \u03b3 transition in 131Xe. The phase angle \u03b7 between the multipole transition amplitudes was measured by observing the angular distribution of the linear polarization of the \u03b3 ray emitted from a 131I source polarized at low temperature (30 mK obtained with a dilution refrigerator). A Compton polarimeter was used to measure linear polarization. The 131Xe transition was selected to minimize atomic final state effects which simulate time-reversal violation. A value sin\u03b7=(-1.1\u00b11.1)\u00d710^-3 was obtained for the transition, consistent with time-reversal invariance.", "date": "1982-03-01", "date_type": "published", "publication": "Physical Review C", "volume": "25", "number": "3", "publisher": "Physical Review C", "pagerange": "1567-1574", "id_number": "CaltechAUTHORS:GIMprc82", "issn": "0556-2813", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:GIMprc82", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevC.25.1567", "primary_object": { "basename": "GIMprc82.pdf", "url": "https://authors.library.caltech.edu/records/y8cg0-s5c73/files/GIMprc82.pdf" }, "resource_type": "article", "pub_year": "1982", "author_list": "Gimlett, J. L.; Henrikson, H. E.; et el." }, { "id": "https://authors.library.caltech.edu/records/77ejr-h7952", "eprint_id": 6700, "eprint_status": "archive", "datestamp": "2023-08-22 02:47:23", "lastmod": "2023-10-16 20:29:07", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kwon-H", "name": { "family": "Kwon", "given": "H." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J.-L." } }, { "id": "Caviagnac-J-F", "name": { "family": "Cavaignac", "given": "J.-F." } }, { "id": "Koang-D-H", "name": { "family": "Koang", "given": "D. H." } }, { "id": "Vignon-B", "name": { "family": "Vignon", "given": "B." } }, { "id": "Feilitzsch-F-v", "name": { "family": "Feilitzsch", "given": "F. v." } }, { "id": "M\u00f6ssbauer-R-L", "name": { "family": "M\u00f6ssbauer", "given": "R. L." } } ] }, "title": "Search for neutrino oscillations at a fission reactor", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91981 The American Physical Society \n\nReceived 7 April 1981 \n\nThe authors wish to thank the ILL for its generous hospitality and support. C. Bouton, C. Barnoux, and B. Guerre Chaley have participated in the construction of the detector. W. Mampe's help in planning the experiment is appreciated. Stimulating discussions with B. Davis, P. Ramond, F. Reines, K. Schreckenbach, H. Sobel, and V. Zacek are gratefully acknowledged. The continuous advice and help by P. Vogel has been invaluable. H. Fritzsch and P. Minkowski, who sparked these investigations during their visit to Caltech in 1975, have provided us with much encouragement. Part of this work constitutes the Ph.D. thesis of H. Kwon. Financial support was provided by the U.S. Department of Energy through Contract No. DE-AC-03-76ER00063, the Alfred P. Sloan Foundation, the Bundesministerium f\u00fcr Forschung and Technologie of the Federal Republic of Germany, and by the Institut National de Physique Nucl\u00e9aire et Physique de Particules of France. F. Boehm is grateful for an award from the Humboldt Foundation. A.A. Hahn has profited from a cooperative NSF-CNRS grant.", "abstract": "The energy spectrum of neutrinos from a fission reactor was studied with the aim of gaining information on neutrino oscillations. The well-shielded detector was set up at a fixed position of 8.76 m from the pointlike core of the Laue-Langevin reactor in an antineutrino flux of 9.8\u00d710^11 cm^-2 s^-1. The target protons in the reaction \u03bd\u0305ep\u2192e+n were provided by liquid-scintillator counters (total volume of 377 l) which also served as positron detectors. The product neutrons moderated in the scintillator were detected by 3He wire chambers. A coincidence signature was required between the prompt positron and the delayed neutron events. The positron energy resolution was 18% full width at half maximum at 0.91 MeV. The signal-to-background ratio was better than 1: 1 between 2 and 6 MeV positron energy. At a counting rate of 1.58 counts per hour, 4890\u00b1180 neutrino-induced events were detected. The shape of the measured positron spectrum was analyzed in terms of the parameters \u03942 and sin22\u03b8 for two-neutrino oscillations. The experimental data are consistent with no oscillations. An upper limit of 0.15 eV2 (90% C.L.) for the mass-squared differences \u03942 of the neutrinos was obtained, assuming maximum mixing of the two-neutrino states. The ratio of the measured to the expected integral yield of positrons assuming no osciliations was determined to be \u222bYexp/\u222bYth=0.955\u00b10.035(statistical)\u00b10.110(systematic).", "date": "1981-09-01", "date_type": "published", "publication": "Physical Review D", "volume": "24", "number": "5", "publisher": "Physical Review D", "pagerange": "1097-1111", "id_number": "CaltechAUTHORS:KWOprd81", "issn": "2470-0010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:KWOprd81", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevD.24.1097", "primary_object": { "basename": "KWOprd81.pdf", "url": "https://authors.library.caltech.edu/records/77ejr-h7952/files/KWOprd81.pdf" }, "resource_type": "article", "pub_year": "1981", "author_list": "Kwon, H.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/4jx38-tc426", "eprint_id": 6167, "eprint_status": "archive", "datestamp": "2023-08-22 02:27:03", "lastmod": "2023-10-16 20:10:22", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-K-C", "name": { "family": "Wang", "given": "K.-C." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Bovet-E", "name": { "family": "Bovet", "given": "E." } }, { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Miller-J-P", "name": { "family": "Miller", "given": "J. P." } }, { "id": "Powers-R-J", "name": { "family": "Powers", "given": "R. J." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J.-L." } }, { "id": "Kunselman-A-R", "name": { "family": "Kunselman", "given": "A. R." } } ] }, "title": "Experimental determination of the relativistic fine-structure splitting in pionic Ti and Fe atoms", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91980 The American Physical Society \n\nReceived 3 April 1980 \n\nWe wish to thank Dr. Louis Rosen and his staff at LAMPF for their hospitality and cooperation. Professor Valentin Telegdi and Dr. Michael Nieto helped us with their clarifying comments on the relativistic equations. We would also like to thank Professor Paul Lee for enlightening discussions and Mr. Mark Manley for valuable assistance during the experiment. One of us (K.-C. Wang) has received partial support from the National Science Foundation under Grant No. PHY75-23206. E. Bovet wishes to acknowledge support from the Swiss National Foundation. This work was supported by the Department of Energy under Grants Nos. DE-AC-03-76-ER00063 and AT[11-1]-2197.", "abstract": "Using a high-resolution crystal spectrometer we have measured the relativistic angular-momentum splittings of the 5g-4f and 5f-4d transitions in pionic Ti and Fe atoms. The observed fine-structure splittings of 85.3\u00b13.0 eV in \u03c0- Ti and 158.5\u00b17.8 eV in \u03c0- Fe agree with the calculated splittings of 88.5 and 167.6 eV, respectively, arising from the Klein-Gordon equation and from small corrections due to vacuum polarization, strong interaction, and electron screening.", "date": "1980-09-01", "date_type": "published", "publication": "Physical Review A", "volume": "22", "number": "3", "publisher": "Physical Review A", "pagerange": "1072-1077", "id_number": "CaltechAUTHORS:WANpra80", "issn": "0556-2791", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:WANpra80", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevA.22.1072", "primary_object": { "basename": "WANpra80.pdf", "url": "https://authors.library.caltech.edu/records/4jx38-tc426/files/WANpra80.pdf" }, "resource_type": "article", "pub_year": "1980", "author_list": "Wang, K.-C.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/k3s0p-xa182", "eprint_id": 6166, "eprint_status": "archive", "datestamp": "2023-08-22 01:53:50", "lastmod": "2023-10-16 20:10:20", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-K-C", "name": { "family": "Wang", "given": "K.-C." } }, { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" } ] }, "title": "Dependence of the K x-ray energy upon the mode of excitation", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91978 The American Physical Society \n\nReceived 20 July 1978 \n\nWe wish to acknowledge the generous help of H.E. Henrikson. This work was supported by the U.S. Dept. of Energy under Contract No. EY-76-C-03-0063.", "abstract": "The energy of the Ta K\u03b1 x rays emitted after electron capture of 181W has been observed to be lower by 0.79\u00b10.06 eV compared to the fluorescent Ta K\u03b1 x rays. Similarly, it was found that the Ta K\u03b1 x rays emitted after internal conversion following \u03b2 decay of 181Hf were higher by 0.7\u00b10.1 eV in energy compared to the same fluorescent Ta x rays. The observed effects cannot be explained by the known mechanisms of chemical shift, hyperfine effects, isomer shifts, and shake-off effects alone. Similar observations of the K-x-ray energy shifts in the electron-capture decays of 153Gd and 175Hf with the corresponding fluorescent x rays in Eu and Lu, respectively, can be accounted for by the hyperfine effects, isotope shifts, and chemical shifts.", "date": "1978-12-01", "date_type": "published", "publication": "Physical Review A", "volume": "18", "number": "6", "publisher": "Physical Review A", "pagerange": "2580-2584", "id_number": "CaltechAUTHORS:WANpra78b", "issn": "0556-2791", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:WANpra78b", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevA.18.2580", "primary_object": { "basename": "WANpra78b.pdf", "url": "https://authors.library.caltech.edu/records/k3s0p-xa182/files/WANpra78b.pdf" }, "resource_type": "article", "pub_year": "1978", "author_list": "Wang, K.-C.; Hahn, A. A.; et el." }, { "id": "https://authors.library.caltech.edu/records/wgebf-8qs47", "eprint_id": 6165, "eprint_status": "archive", "datestamp": "2023-08-22 01:44:31", "lastmod": "2023-10-16 20:10:18", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-K-C", "name": { "family": "Wang", "given": "K.-C." } }, { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Precise measurements of K\u03b1 x-ray linewidths in Eu, Tm, and Ta", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91978 The American Physical Society \n\nReceived 14 December 1977 \n\nWe wish to thank H. Henrikson for helping in the experiment and Professor P. Lee and Professor P. Vogel for valuable discussions. We also wish to thank Professor P. Van Assche for generously providing the silicon crystal. This work was supported by the Department of Energy under Contract No. EY-76-C-03-0063.", "abstract": "The widths of K\u03b11 and K\u03b12 x rays in Eu, Tm, and Ta have been measured to an accuracy of (2-4)% with a high-resolution spectrometer by means of third- and fourth-order diffraction from the (111) crystalline planes of a bent silicon crystal. The measured values confirm the results from calculations of the radiative, Auger, and Coster-Kronig widths. Possible effects from hyperfine interaction, Coulomb exchange interaction, and chemical shift are discussed.", "date": "1978-05-01", "date_type": "published", "publication": "Physical Review A", "volume": "17", "number": "5", "publisher": "Physical Review A", "pagerange": "1735-1738", "id_number": "CaltechAUTHORS:WANpra78a", "issn": "0556-2791", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:WANpra78a", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevA.17.1735", "primary_object": { "basename": "WANpra78a.pdf", "url": "https://authors.library.caltech.edu/records/wgebf-8qs47/files/WANpra78a.pdf" }, "resource_type": "article", "pub_year": "1978", "author_list": "Wang, K.-C.; Hahn, A. A.; et el." }, { "id": "https://authors.library.caltech.edu/records/6d57j-2xd36", "eprint_id": 10647, "eprint_status": "archive", "datestamp": "2023-08-22 01:44:42", "lastmod": "2023-10-16 22:59:25", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lee-P-L", "name": { "family": "Lee", "given": "P. L." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } } ] }, "title": "Variations of nuclear charge radii in mercury isotopes with A=198, 199, 200, 201, 202, and 204 from x-ray isotope shifts", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1978 by The American Physical Society. \n\nReceived 18 October 1977.", "abstract": "The isotope shifts of atomic K x rays were measured for pairs of the six mercury isotopes with A=198, 199, 200, 201, 202, and 204, using a curved crystal spectrometer. The changes of the nuclear charge radii were derived in terms of \u03b4\u3008r2\u3009 and \u03b4Rk and compared with optical and muonic isotope shift data. From our results, a renormalization of the optical data was obtained.", "date": "1978-05-01", "date_type": "published", "publication": "Physical Review C", "volume": "17", "number": "5", "publisher": "Physical Review C", "pagerange": "1859-1861", "id_number": "CaltechAUTHORS:LEEprc78", "issn": "0556-2813", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:LEEprc78", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevC.17.1859", "primary_object": { "basename": "LEEprc78.pdf", "url": "https://authors.library.caltech.edu/records/6d57j-2xd36/files/LEEprc78.pdf" }, "resource_type": "article", "pub_year": "1978", "author_list": "Lee, P. L.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/fk8ja-5by27", "eprint_id": 3427, "eprint_status": "archive", "datestamp": "2023-08-22 01:33:00", "lastmod": "2023-10-16 15:53:03", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Wang-K-C", "name": { "family": "Wang", "given": "K.-C." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" } ] }, "title": "Reply to the Comment on \"Dependence of the Ta K x-ray energy on the mode of excitation\"", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91977 The American Physical Society \n\nReceived 2 May 1977 \n\nWe would like to thank M. S. Freedman, M. L. Perlman, and J. P. Briand for correspondence. Work supported by U.S. ERDA AT[04-3]-63.", "abstract": "The difficulties in interpretation of the K x-ray shifts are acknowledged. A new experiment confirms, with higher accuracy, the previously reported data and excludes the possibility of a chemical shift.", "date": "1977-09-01", "date_type": "published", "publication": "Physical Review A", "volume": "16", "number": "3", "publisher": "Physical Review A", "pagerange": "1317", "id_number": "CaltechAUTHORS:HAHpra77", "issn": "0556-2791", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:HAHpra77", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevA.16.1317", "primary_object": { "basename": "HAHpra77.pdf", "url": "https://authors.library.caltech.edu/records/fk8ja-5by27/files/HAHpra77.pdf" }, "resource_type": "article", "pub_year": "1977", "author_list": "Hahn, A. A.; Wang, K.-C.; et el." }, { "id": "https://authors.library.caltech.edu/records/fxwmr-jrs30", "eprint_id": 32819, "eprint_status": "archive", "datestamp": "2023-08-19 10:24:23", "lastmod": "2023-10-18 16:20:34", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Hahn-A", "name": { "family": "Hahn", "given": "A." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Miller-J", "name": { "family": "Miller", "given": "J." } }, { "id": "Powers-R-J", "name": { "family": "Powers", "given": "R. J." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Vuilleumier-J-L", "name": { "family": "Vuilleumier", "given": "J. L." } }, { "id": "Wang-K-C", "name": { "family": "Wang", "given": "K. C." } } ] }, "title": "Determination of Strong-Interaction Widths and Shifts of Pionic X-Rays with a Crystal Spectrometer", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1977 The American Physical Society.\nReceived 15 November 1976; published in the issue dated 31 January 1977.\nWe could not have performed this experiment\nwithout the help and encouragement of Dr. R. Siegel\nand his staff.\nWork supported by U. S, Energy Research and Development\nAdministration under Contract No. AT[04-3]-63.\n\nPublished - BOEprl77a.pdf
", "abstract": "Pionic 3d-2p atomic transitions in F, Na, and Mg have been studied using a bent crystal spectrometer. The pionic atoms were formed in the production target placed in the external proton beam of the Space Radiation Effects Laboratory synchrocyclotron. The observed energies and widths of the transitions are E=41679(3) eV and \u0393=21(8) eV, E=62434(18) eV and \u0393=22(80) eV, E=74389(9) eV and \u0393=67(35) eV, in F, Na, and Mg, respectively. The results are compared with calculations based on a pion-nucleus optical potential.", "date": "1977-01", "date_type": "published", "publication": "Physical Review Letters", "volume": "38", "number": "5", "publisher": "American Physical Society", "pagerange": "215-218", "id_number": "CaltechAUTHORS:20120731-122324437", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120731-122324437", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Energy Research and Development Administration (ERDA)", "grant_number": "AT[04-3]-63" } ] }, "doi": "10.1103/PhysRevLett.38.215", "primary_object": { "basename": "BOEprl77a.pdf", "url": "https://authors.library.caltech.edu/records/fxwmr-jrs30/files/BOEprl77a.pdf" }, "resource_type": "article", "pub_year": "1977", "author_list": "Boehm, F.; Hahn, A.; et el." }, { "id": "https://authors.library.caltech.edu/records/0fxtz-58j10", "eprint_id": 3428, "eprint_status": "archive", "datestamp": "2023-08-22 01:18:11", "lastmod": "2023-10-16 15:53:05", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hahn-A-A", "name": { "family": "Hahn", "given": "A. A." } }, { "id": "Wang-K-C", "name": { "family": "Wang", "given": "K.-C." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Henrikson-H-E", "name": { "family": "Henrikson", "given": "H. E." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" } ] }, "title": "Dependence of the Ta K X-Ray Energy on the Mode of Excitation", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91976 The American Physical Society \n\nReceived 3 November 1976 \n\nWork supported by U.S. Research and Development Administration under Contract No. AT(04-3)-63.", "abstract": "We have found that tantalum K x rays resulting from the K capture of 181W to 181Ta are lower in energy than the \"normal\" Ta K x rays produced by self-fluorescence in a tantalum source. The resulting shift, EW source-ETa source=-0.67(13), -0.96(12), -1.8(5) eV for the Ta K\u03b11, K\u03b12, and K\u03b21 lines, respectively. An interpretation in terms of a multiple-electron shake-off is presented.", "date": "1976-12-27", "date_type": "published", "publication": "Physical Review Letters", "volume": "37", "number": "26", "publisher": "American Physical Society", "pagerange": "1741-1743", "id_number": "CaltechAUTHORS:HAHprl76", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:HAHprl76", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevLett.37.1741", "primary_object": { "basename": "HAHprl76.pdf", "url": "https://authors.library.caltech.edu/records/0fxtz-58j10/files/HAHprl76.pdf" }, "resource_type": "article", "pub_year": "1976", "author_list": "Hahn, A. A.; Wang, K.-C.; et el." }, { "id": "https://authors.library.caltech.edu/records/ft789-2em70", "eprint_id": 2270, "eprint_status": "archive", "datestamp": "2023-08-22 00:45:24", "lastmod": "2023-10-13 23:17:53", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Powers-R-J", "name": { "family": "Powers", "given": "R. J." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" }, { "id": "Zehnder-A-T", "name": { "family": "Zehnder", "given": "A." } }, { "id": "King-T", "name": { "family": "King", "given": "T." } }, { "id": "Kunselman-A-R", "name": { "family": "Kunselman", "given": "A. R." } }, { "id": "Roberson-P", "name": { "family": "Roberson", "given": "P." } }, { "id": "Martin-P", "name": { "family": "Martin", "given": "P." } }, { "id": "Miller-G-H", "name": { "family": "Miller", "given": "G. H." } }, { "id": "Welsh-R-E", "name": { "family": "Welsh", "given": "R. E." } }, { "id": "Jenkins-D-A", "name": { "family": "Jenkins", "given": "D. A." } } ] }, "title": "Precise determination of E2 and E4 moments in (165)Ho from muonic X rays", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91975 The American Physical Society. \n\nReceived 9 December 1974. \n\nWork was supported in part by the U. S. Atomic Energy Commission under Contracts No. AT[04-3]-63 and No. AT[11-1]-2197, by the National Science Foundation, and by the National Aeronautics and Space Administration under Grant No. NGL-47-004-033.", "abstract": "The quadruple and hexadecapole moments of 165Ho were derived from the hfs of the 3d muonic states. The resulting values are Q0 = 7.44 +/- 0.07 b and II0 = 0.52 +/- 0.10 b2. The parameters of the nuclear charge distribution were determined. An indication for an angular variation of the skin thickness was found.", "date": "1975-02-24", "date_type": "published", "publication": "Physical Review Letters", "volume": "34", "number": "8", "publisher": "American Physical Society", "pagerange": "492-495", "id_number": "CaltechAUTHORS:POWprl75", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:POWprl75", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevLett.34.492", "primary_object": { "basename": "POWprl75.pdf", "url": "https://authors.library.caltech.edu/records/ft789-2em70/files/POWprl75.pdf" }, "resource_type": "article", "pub_year": "1975", "author_list": "Powers, R. J.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/49xr1-ar449", "eprint_id": 9633, "eprint_status": "archive", "datestamp": "2023-08-22 00:30:49", "lastmod": "2023-10-16 22:23:52", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lee-P-L", "name": { "family": "Lee", "given": "P. L." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Vogel-P", "name": { "family": "Vogel", "given": "P." }, "orcid": "0000-0003-0587-5466" } ] }, "title": "Energy shifts of K x-ray lines for different chemical compounds of Ru, Pr, and Yb", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91974 The American Physical Society. \n\nReceived 24 July 1973. \n\nH. Henrikson's contribution in building the spectrometer is gratefully acknowledged. Thanks are due to Dr. K. Gschneidner for a valuable correspondence and to Dr. F. Wagner for the cesium praseodymium fluoride samples. \n\nWork performed under the auspices of the U.S. Atomic Energy Commission. Prepared under Contract No. AT[04-3]-63 for the San Francisco Operations Office, U.S. AEC.", "abstract": "The energy shifts of K\u03b12, K\u03b11, K\u03b23, K\u03b21, and K\u03b22 x rays were measured for the following Ru, Pr, and Yb compounds: Ru, Ru(CO2)Cl2, RuO2, [Ru(NH3)4OHCl]Cl \u00b7 2H2O, and RuF3; Pr, PrC2, Pr2O3, PrFeO3, Pr6O11, PrO2, CsPrF5, and Cs2PrF6, Yb, YbF3, and Yb2O3. The results are compared with free-ion relativistic self-consistent-field calculations. The measurements bear out the dominant role of the 4f electrons in energy shifts between the trivalent and tetravalent Pr and the divalent and trivalent Yb. In Yb the full free-ion value is observed, while in Pr the free-ion value appears to be attenuated by a factor of 0.4, presumably owing to covalency. In all cases the relation of the x-ray energy shift to the M\u00f6ssbauer isomer shift is discussed.", "date": "1974-02-01", "date_type": "published", "publication": "Physical Review A", "volume": "9", "number": "2", "publisher": "Physical Review A", "pagerange": "614-621", "id_number": "CaltechAUTHORS:LEEpra74", "issn": "0556-2791", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:LEEpra74", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevA.9.614", "primary_object": { "basename": "LEEpra74.pdf", "url": "https://authors.library.caltech.edu/records/49xr1-ar449/files/LEEpra74.pdf" }, "resource_type": "article", "pub_year": "1974", "author_list": "Lee, P. L.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/twa0d-we438", "eprint_id": 5424, "eprint_status": "archive", "datestamp": "2023-08-21 23:23:05", "lastmod": "2023-10-16 19:12:49", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Kankeleit-E", "name": { "family": "Kankeleit", "given": "E." } } ] }, "title": "Experimental evidence for parity impurity in a nuclear gamma transition", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91965 The American Physical Society. \n\nReceived 25 January 1965. \n\nThis work was performed under the auspices of the U. S. Atomic Energy Commission. \n\nThe authors wish to thank R. P. Feynman, M. Gell-Mann, F. C. Michel, S. Wahlborn, and A. Winther for many valuable discussions, and R. Chesler for help in the experiment.", "abstract": "In this communication we present a preliminary account of an experimental investigation of parity admixture in nuclear states. Our measurements give evidence of a small parity admixture in a nuclear gamma transition of 482 keV in Ta181.", "date": "1965-03-01", "date_type": "published", "publication": "Physical Review Letters", "volume": "14", "number": "9", "publisher": "American Physical Society", "pagerange": "312-315", "id_number": "CaltechAUTHORS:BOEprl65", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEprl65", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevLett.14.312", "primary_object": { "basename": "BOEprl65.pdf", "url": "https://authors.library.caltech.edu/records/twa0d-we438/files/BOEprl65.pdf" }, "resource_type": "article", "pub_year": "1965", "author_list": "Boehm, F. and Kankeleit, E." }, { "id": "https://authors.library.caltech.edu/records/00psa-7hy83", "eprint_id": 7368, "eprint_status": "archive", "datestamp": "2023-08-21 23:19:13", "lastmod": "2023-10-16 20:52:02", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kankeleit-E", "name": { "family": "Kankeleit", "given": "E." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Hager-R", "name": { "family": "Hager", "given": "R." } } ] }, "title": "M\u00f6ssbauer effect in Tm169 and total internal conversion of the 8.42-keV transition", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91964 The American Physical Society. \n\nReceived 30 December 1963. \n\nThis work was conducted under the auspices of the U.S. Atomic Energy Commission.", "abstract": "The absolute yield of the M\u00f6ssbauer absorption of the 8.42-keV transition in Tm169 was determined for a thulium oxide and a thulium metal absorber. The 8.42-keV gamma ray was resolved from the L x rays of erbium by means of a flat lithium fluoride crystal diffraction spectrometer. From the observed M\u00f6ssbauer absorption effect the total conversion coefficient \u03b1tot=325\u00b135 and the magnetic transition rate of B(M1, 3/2\u21921/2)=5.1\u00d710^-2 (eh/2Mc)^2 was derived.", "date": "1964-05-25", "date_type": "published", "publication": "Physical Review", "volume": "134", "number": "4B", "publisher": "Physical Review", "pagerange": "B747-B751", "id_number": "CaltechAUTHORS:KANpr64", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:KANpr64", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.134.B747", "primary_object": { "basename": "KANpr64.pdf", "url": "https://authors.library.caltech.edu/records/00psa-7hy83/files/KANpr64.pdf" }, "resource_type": "article", "pub_year": "1964", "author_list": "Kankeleit, E.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/atv6c-p7z47", "eprint_id": 3496, "eprint_status": "archive", "datestamp": "2023-08-21 23:17:14", "lastmod": "2023-10-16 15:56:57", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Alexander-P", "name": { "family": "Alexander", "given": "P." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Kankeleit-E", "name": { "family": "Kankeleit", "given": "E." } } ] }, "title": "Spin-23/2- Isomer of Lu177", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91964 The American Physical Society \n\nReceived 3 September 1963 \n\nThe authors are indebted to O.B. Nielsen for communicating to them some of his results prior to publication, and to J. deBoer, J.D. Rogers, and B. Stech, and S. Wahlborn for illuminatinf discussions. The help of R. Hager and L. Varnell with the gamma spectrometer is greatly appreciated. \n\nWork performed under the auspices of the U.S. Atomic Energy Commission.", "abstract": "Investigations of the decay of the three-particle state in Lu177 with spin 23/2- performed with the crystal diffraction technique revealed evidence for three-particle states in Hf177 and rotational bands in Lu177 and in Hf177. Levels with spins to 17/2 were found in the K=7/2+ rotational band in Lu177 while the K=7/2- and K=9/2+ bands in Hf177 were found to be excited up to spin 21/2 levels. From energy and intensity measurements of the cascade, crossover, and interband transitions, the values of a number of parameters pertinent to the collective model were derived. In particular, it was verified for each of the rotational bands that the quantity (gK-gR)/Q0 was a constant within the experimental error.", "date": "1964-01-27", "date_type": "published", "publication": "Physical Review", "volume": "133", "number": "2B", "publisher": "Physical Review", "pagerange": "B284-B290", "id_number": "CaltechAUTHORS:ALEpr64", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:ALEpr64", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.133.B284", "primary_object": { "basename": "ALEpr64.pdf", "url": "https://authors.library.caltech.edu/records/atv6c-p7z47/files/ALEpr64.pdf" }, "resource_type": "article", "pub_year": "1964", "author_list": "Alexander, P.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/803nm-18g07", "eprint_id": 1923, "eprint_status": "archive", "datestamp": "2023-08-21 23:09:59", "lastmod": "2023-10-13 23:05:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Seppi-E-J", "name": { "family": "Seppi", "given": "E. J." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Nuclear resonance excitation using a diffraction monochromator", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 1962 The American Physical Society. \n\nReceived 16 July 1962. \n\nWe wish to express our appreciation to Professor J. W. M. DuMond for his constant interest in the progress of the research and for his valuable advice and encouragement. Thanks are due to H. E. Henrikson for his excellent engineering advice throughout this work. We furthermore wish to thank C. H. Holland and D. Agresti for their assistance in collection and analysis of the data.\n\nThis work was performed under the auspices of the U.S. Atomic Energy Commission.", "abstract": "Nuclear resonance scattering from the first excited states in F19 and Mn55 has been studied with the bent-diffraction-crystal monochromator. The experiment was performed by observing the scattered radiation from nuclei exposed to nearly monoenergetic x rays selected by crystal diffraction from the bremsstrahlung spectrum of an x-ray tube. Gamma rays scattered at 135\u00b0 from samples of lithium fluoride and manganese placed in the diffracted beam were observed as a function of the incident photon wavelength. With the lithium fluoride sample three measurements were made under different experimental conditions. In each case pronounced resonance peaks 10 to 15% above background were observed. A least-squares analysis of the data gives 109.894\u00b10.005 keV for the energy position of the first excited level in F19. From the observed yield the width of this level was deduced to be (5.1\u00b10.7)\u00d710^-7 eV. Measurements with a Mn55 scattering sample gave 125.95\u00b10.01 keV for the position of the first excited level and (1.1\u00b10.3)\u00d710^-6 eV for the resonance width.", "date": "1962-12-01", "date_type": "published", "publication": "Physical Review", "volume": "128", "number": "5", "publisher": "Physical Review", "pagerange": "2334-2339", "id_number": "CaltechAUTHORS:SEPpr62", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:SEPpr62", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.128.2334", "primary_object": { "basename": "SEPpr62.pdf", "url": "https://authors.library.caltech.edu/records/803nm-18g07/files/SEPpr62.pdf" }, "resource_type": "article", "pub_year": "1962", "author_list": "Seppi, E. J. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/axxyd-awr12", "eprint_id": 3460, "eprint_status": "archive", "datestamp": "2023-08-21 23:01:31", "lastmod": "2023-10-16 15:55:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Muir-A-H-Jr", "name": { "family": "Muir", "given": "Arthur H., Jr." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Nuclear spectroscopy of Ta181", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91961 The American Physical Society. \n\nReceived 16 January 1961. \n\nThe authors wish to express their appreciation for the support and encouragement of Professor Jesse W. M. DuMond, and wish to acknowledge many helpful discussions with Dr. U. Hauser, Dr. G. Manning, Dr. G. Nijgh, and Dr. J. D. Rogers.", "abstract": "The nuclear levels of Ta181 were investigated by a study of the \u03b2 decay of Hf181 and the electron capture decay of W181. Evidence for weak M-shell conversion lines of an \u223c6-kev transition in the Hf181 was found with a \u03b2 spectrometer. An investigation of the W181 decay with this instrument revealed strong M-shell conversion lines corresponding to a 6.25\u00b10.3-kev transition. With the aid of additional evidence, the conclusion is made that the 476-kev transition in the Hf181 decay occurs between the 482-kev level and a new level at 6 kev. On using an argon proportional counter, a 6-kev \u03b3 ray was also found in the W181 decay. The conversion coefficient of this transition was determined to be \u03b1T=44\u00b17. This conversion coefficient and the M-subshell conversion ratios indicate that the 6-kev transition is of E1 multipolarity. The 6-kev level is assigned as the 9/2- [514] Nilsson intrinsic state. It is also concluded that the previously reported 152-kev transition in the W181 decay occurs between a new 11/2- (K=9/2-) rotational level at 158 kev and the 6-kev level. From a measurement of the tantalum L/K x-ray intensity ratio, the W181 decay energy is found to be 176-22+44 kev. The branchings of this decay to the various Ta181 levels are as follows: 158 kev (0.11%), 136 kev (0.067%), 6.25 kev (\u223c35%), and ground state (\u223c65%). All findings and proposals are consistent with predictions of the unified model of the nucleus.", "date": "1961-06-01", "date_type": "published", "publication": "Physical Review", "volume": "122", "number": "5", "publisher": "Physical Review", "pagerange": "1564-1573", "id_number": "CaltechAUTHORS:MUIpr61", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MUIpr61", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.122.1564", "primary_object": { "basename": "MUIpr61.pdf", "url": "https://authors.library.caltech.edu/records/axxyd-awr12/files/MUIpr61.pdf" }, "resource_type": "article", "pub_year": "1961", "author_list": "Muir, Arthur H., Jr. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/qdhzr-dmm10", "eprint_id": 2696, "eprint_status": "archive", "datestamp": "2023-08-21 23:00:30", "lastmod": "2023-10-13 23:40:57", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Edwards-W-F", "name": { "family": "Edwards", "given": "W. F." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Decay of Hf180m", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91961 The American Physical Society. \n\nReceived 26 October 1960. \n\nWe wish to acknowledge the assistance of E. Seppi, A. Lebor, and R. Cohen in the collection of data, and of Dr. E. R. Cohen for outlining the least-squares procedure to be used where the input data is highly correlated. Thanks are also due to Dr. J. W. M. DuMond and Dr. G. Nijgh for helpful discussions and criticism.", "abstract": "The energies and relative intensities of the gamma radiation and the relative intensities of the conversion electrons following the decay of 5.5-hr Hf180m have been measured using the curved-crystal gamma-ray spectrometer (recently calibrated for accurate intensity measurements), the ring-focused beta-ray spectrometer, and the semicircular spectrometer at the California Institute of Technology. The measured transition energies are: 57.54\u00b10.01, 93.33\u00b10.02, 215.25\u00b10.13, 332.5\u00b10.3, and 443.8\u00b10.6 kev. The energy levels deduced from these values are not entirely consistent with the two-parameter rotational formula. Conversion coefficients derived from the measurements were absolutely normalized using a method involving information available from the decay scheme. All of the 57.54-kev transition conversion coefficients are anomalously high if compared with the theoretical E1 coefficients. No admixture of M2+E3 can account for the anomaly. The K conversion coefficients of the E2 transitions are all about 10% low with exception of the 93.33-kev transition. The L coefficients have a varying deviation, the maximum being 12%. The K conversion coefficient of the 501.3-kev transition has the value 0.037\u00b10.012 which is consistent with the theoretical E3 value of 0.040.", "date": "1961-03-01", "date_type": "published", "publication": "Physical Review", "volume": "121", "number": "5", "publisher": "Physical Review", "pagerange": "1499-1503", "id_number": "CaltechAUTHORS:EDWpr61", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:EDWpr61", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.121.1499", "primary_object": { "basename": "EDWpr61.pdf", "url": "https://authors.library.caltech.edu/records/qdhzr-dmm10/files/EDWpr61.pdf" }, "resource_type": "article", "pub_year": "1961", "author_list": "Edwards, W. F. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/sgnp2-4p879", "eprint_id": 2695, "eprint_status": "archive", "datestamp": "2023-08-21 22:56:05", "lastmod": "2023-10-13 23:40:55", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Gallagher-C-J-Jr", "name": { "family": "Gallagher", "given": "C. J., Jr." } } ] }, "title": "Measurement of the circular polarization of resonance-scattered gamma rays following the electron capture of Se75", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91960 The American Physical Society.\nReceived 8 February 1960.\nWe wish to thank Dr. H. Weidenmuller and Dr. L. Kruger for many helpful discussions.", "abstract": "The circular polarization of the 265-kev \u03b3 rays following the mixed Gamow-Teller and Fermi electron-capture decay of Se75 into As75 has been measured. The neutrino momentum was fixed with the help of a resonance scattering process. From the experimentally determined degree of right-hand circular polarization of -0.21\u00b10.15 it was concluded that the sign of the Gamow-Teller to Fermi matrix-element ratio in this beta decay is negative.", "date": "1960-07-01", "date_type": "published", "publication": "Physical Review", "volume": "119", "number": "1", "publisher": "Physical Review", "pagerange": "258-262", "id_number": "CaltechAUTHORS:BOEpr60", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr60", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.119.258", "primary_object": { "basename": "BOEpr60.pdf", "url": "https://authors.library.caltech.edu/records/sgnp2-4p879/files/BOEpr60.pdf" }, "resource_type": "article", "pub_year": "1960", "author_list": "Boehm, F. and Gallagher, C. J., Jr." }, { "id": "https://authors.library.caltech.edu/records/066sa-nxm77", "eprint_id": 2693, "eprint_status": "archive", "datestamp": "2023-08-21 22:47:49", "lastmod": "2023-10-13 23:40:50", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Soergel-V", "name": { "family": "Soergel", "given": "Volker" } }, { "id": "Stech-B", "name": { "family": "Stech", "given": "Berthold" } } ] }, "title": "Higher-order effects in the allowed beta decay of F20", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91958 The American Physical Society. \n\nReceived 23 June 1958. \n\nThanks are due to Professor M. Gell-Mann for many valuable discussions. One of us (V. S.) is indebted to the Kultusministerium of Baden-Wurttemberg, Germany, for a grant.", "abstract": "It has been proposed by Gell-Mann(1) that the usual vector interaction in beta decay should be modified by addition of a small correction term due to the effect of virtual meson currents around the nucleons. This term in proportional to the difference of the anomalous magnetic moments of protons and neutrons and is of the order of 0.1% per Mev beta energy.", "date": "1958-07-15", "date_type": "published", "publication": "Physical Review Letters", "volume": "1", "number": "2", "publisher": "American Physical Society", "pagerange": "77-79", "id_number": "CaltechAUTHORS:BOEprl58", "issn": "0031-9007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEprl58", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRevLett.1.77", "primary_object": { "basename": "BOEprl58.pdf", "url": "https://authors.library.caltech.edu/records/066sa-nxm77/files/BOEprl58.pdf" }, "resource_type": "article", "pub_year": "1958", "author_list": "Boehm, F.; Soergel, Volker; et el." }, { "id": "https://authors.library.caltech.edu/records/9ywh3-rvc51", "eprint_id": 2694, "eprint_status": "archive", "datestamp": "2023-08-21 22:45:40", "lastmod": "2023-10-13 23:40:52", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Interference between Gamow-Teller and Fermi interaction in Mn52", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91958 The American Physical Society. \n\nReceived 9 December 1957. \n\nWe wish to thank Dr. B. Stech for many helpful discussions and Professor J. W. M. DuMond for his interest in this work.", "abstract": "The existence of a strong interference between the Gamow-Teller and the Fermi part of the \u03b2 interaction has been reported from this laboratory(1,2) in a study of the circular polarization of the \u03b3 rays measured in coincidence with the preceding \u03b2 particles(3) in the case of Sc46.", "date": "1958-02-01", "date_type": "published", "publication": "Physical Review", "volume": "109", "number": "3", "publisher": "Physical Review", "pagerange": "1018-1019", "id_number": "CaltechAUTHORS:BOEpr58b", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr58b", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.109.1018", "primary_object": { "basename": "BOEpr58b.pdf", "url": "https://authors.library.caltech.edu/records/9ywh3-rvc51/files/BOEpr58b.pdf" }, "resource_type": "article", "pub_year": "1958", "author_list": "Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/8j768-jxj79", "eprint_id": 2692, "eprint_status": "archive", "datestamp": "2023-08-21 22:45:11", "lastmod": "2023-10-13 23:40:48", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Wapstra-A-H", "name": { "family": "Wapstra", "given": "A. H." } } ] }, "title": "Beta-gamma circular polarization correlation experiments", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91958 The American Physical Society. \n\nReceived 25 September 1957. \n\nThe authors are very much indebted to Dr. B. Stech for many helpful discussions. They are also indebted to Professor R. P. Feynman, Professor M. Gell-Mann, Professor J. W. M. DuMond, Dr. K. Alder, Dr. T. B. Novey, and Dr. A. Winther for their continuous interest in this work. The contribution of Mr. H. Henrikson in designing the analyzer magnet is greatly appreciated.", "abstract": "A circular polarization analyzer for \u03b3 rays is described. Measurements on circular polarization of bremsstrahlung due to \u03b2 particles from P32 and Tm170 agree with previous and concurrent measurements and, together with Co60 circular polarization correlation studies, establish a check on the calculated calibration curve of the analyzer. We have studied the \u03b2-\u03b3 circular polarization correlation in the following allowed j-j transitions: Na24, Sc44, Sc46, V48, and Co58. The result for Sc46 indicates the presence of a strong interference between Gamow-Teller and Fermi couplings. The \u03b2 interaction, therefore, should contain a combination of S and T, or (and) V and A, interactions with small or no phase difference between the interaction constants. If one assumes maximum interference, our experiments give information on the ratio of Gamow-Teller to Fermi interaction. The once-forbidden transition Au198 gives the maximum possible asymmetry. All results are in agreement with the 2-component neutrino theory and the assumption of V, A or alternatively S, T, P interaction.", "date": "1958-01-15", "date_type": "published", "publication": "Physical Review", "volume": "109", "number": "2", "publisher": "Physical Review", "pagerange": "456-461", "id_number": "CaltechAUTHORS:BOEpr58a", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr58a", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.109.456", "primary_object": { "basename": "BOEpr58a.pdf", "url": "https://authors.library.caltech.edu/records/8j768-jxj79/files/BOEpr58a.pdf" }, "resource_type": "article", "pub_year": "1958", "author_list": "Boehm, F. and Wapstra, A. H." }, { "id": "https://authors.library.caltech.edu/records/ma42e-xvq40", "eprint_id": 2691, "eprint_status": "archive", "datestamp": "2023-08-21 22:44:52", "lastmod": "2023-10-13 23:40:46", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Novey-T-B", "name": { "family": "Novey", "given": "T. B." } }, { "id": "Barnes-C-A", "name": { "family": "Barnes", "given": "C. A." } }, { "id": "Stech-B", "name": { "family": "Stech", "given": "B." } } ] }, "title": "Positron polarization in a mirror transition", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91957 The American Physical Society. \n\nReceived 29 August 1957. \n\nThe authors are much indebted to Mr. D. Kohler for assistance with the source preparation, and to Professor J. W. M. DuMond, Professor W. A. Fowler, Professor M. Gell-Mann, Professor C. C. Lauristan, and Dr. A. H. Wapstra for their advice and interest in this work. One of us (B. S.) wishes to thank the Deutsche Forschungsgemeinschaft for a grant.", "abstract": "The positron polarization in the mirror transition N13, a predominantly Fermi transition, has been measured by detecting the circular polarization of the annihilation-in-flight quanta. The results indicate complete polarization of the positrons parallel to their momentum, showing that Fermi coupling contributes significantly to the positron polarization in the same sense as the Gamow-Teller coupling.", "date": "1957-12-15", "date_type": "published", "publication": "Physical Review", "volume": "108", "number": "6", "publisher": "Physical Review", "pagerange": "1497-1499", "id_number": "CaltechAUTHORS:BOEpr57e", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr57e", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.108.1497", "primary_object": { "basename": "BOEpr57e.pdf", "url": "https://authors.library.caltech.edu/records/ma42e-xvq40/files/BOEpr57e.pdf" }, "resource_type": "article", "pub_year": "1957", "author_list": "Boehm, F.; Novey, T. B.; et el." }, { "id": "https://authors.library.caltech.edu/records/6qzhw-9zh67", "eprint_id": 2622, "eprint_status": "archive", "datestamp": "2023-08-21 22:44:31", "lastmod": "2023-10-13 23:38:24", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hatch-E-N", "name": { "family": "Hatch", "given": "E. N." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Rotational spectrum of Tm171", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91957 The American Physical Society. \n\nReceived 21 June 1957. \n\nWe wish to thank Dr. S. A. Moszkowski for a stimulating discussion and Professor J. W. M. DuMond for his continued interest in this work.", "abstract": "The gamma rays emitted from Tm171 following the Er171 beta decay have been measured with the twometer curved-crystal spectrometer and a semicircular beta-ray spectrometer, enabling a comparison of the nuclear levels and rotational parameters for the Tm171 ground-state band with the corresponding levels and parameters of Tm169. The measured gamma rays have the following energies in kev: 5.06\u00b10.05, 12.40\u00b10.05, 111.63\u00b10.02, 116.69\u00b10.03, 124.03\u00b10.03, 210.62\u00b10.15, 284.9\u00b10.7, 295.97\u00b10.15, 308.37\u00b10.15. In comparing the rotational parameters, a slight increase in the deformation of Tm171 over that of Tm169 is noted. The relatively large change in the decoupling parameter (a=-0.8563) for Tm171 compared with that of Tm169 cannot be accounted for entirely by the small change in nuclear deformation.", "date": "1957-10-01", "date_type": "published", "publication": "Physical Review", "volume": "108", "number": "1", "publisher": "Physical Review", "pagerange": "113-115", "id_number": "CaltechAUTHORS:HATpr57", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:HATpr57", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.108.113", "primary_object": { "basename": "HATpr57.pdf", "url": "https://authors.library.caltech.edu/records/6qzhw-9zh67/files/HATpr57.pdf" }, "resource_type": "article", "pub_year": "1957", "author_list": "Hatch, E. N. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/3c590-rfj91", "eprint_id": 2681, "eprint_status": "archive", "datestamp": "2023-08-21 22:44:21", "lastmod": "2023-10-13 23:40:26", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Wapstra-A-H", "name": { "family": "Wapstra", "given": "A. H." } } ] }, "title": "\u03b2-\u03b3 circular polarization correlation in Au198 and Co58", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91957 The American Physical Society. \n\nReceived 17 June 1957. \n\nWe are very much indebted to Dr. B. Stech for many helpful discussions and Professor J. W. M. DuMond for his interest in this work.", "abstract": "The \u03b2-\u03b3 circular polarization correlation provides a valuable tool for the study of the beta-decay interaction.(1,2) Recently a large interference term due to the presence of S and T or V and A interaction has been found in the allowed J-J transition of Sc46.(3) We report here studies of the J-J transitions in Au198 and Co58.", "date": "1957-09-01", "date_type": "published", "publication": "Physical Review", "volume": "107", "number": "5", "publisher": "Physical Review", "pagerange": "1462", "id_number": "CaltechAUTHORS:BOEpr57d", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr57d", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.107.1462", "primary_object": { "basename": "BOEpr57d.pdf", "url": "https://authors.library.caltech.edu/records/3c590-rfj91/files/BOEpr57d.pdf" }, "resource_type": "article", "pub_year": "1957", "author_list": "Boehm, F. and Wapstra, A. H." }, { "id": "https://authors.library.caltech.edu/records/mhz0d-2w152", "eprint_id": 2625, "eprint_status": "archive", "datestamp": "2023-08-21 22:44:01", "lastmod": "2023-10-13 23:38:31", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Wapstra-A-H", "name": { "family": "Wapstra", "given": "A. H." } } ] }, "title": "\u03b2-\u03b3 circular polarization correlation in a J-J transition", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91957 The American Physical Society. \n\nReceived 26 June 1957. \n\nWe thank Professor R. Feynman and Professor M. Gell-Mann, and particularly Dr. K. Alder, Dr. B. Stech, and Dr. A. Winther for many illuminating discussions, and Professor J. W. M. DuMond for his interest in this work.", "abstract": "The study of \u03b2-\u03b3 circular polarization correlation in \u03b2 transitions without spin change provides valuable information about \u03b2-decay coupling constants. (1,2) In particular, the experimental result will depend on the presence or absence of S,T and V,A interference terms.(2)", "date": "1957-08-15", "date_type": "published", "publication": "Physical Review", "volume": "107", "number": "4", "publisher": "Physical Review", "pagerange": "1202-1203", "id_number": "CaltechAUTHORS:BOEpr57c", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr57c", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.107.1202.2", "primary_object": { "basename": "BOEpr57c.pdf", "url": "https://authors.library.caltech.edu/records/mhz0d-2w152/files/BOEpr57c.pdf" }, "resource_type": "article", "pub_year": "1957", "author_list": "Boehm, F. and Wapstra, A. H." }, { "id": "https://authors.library.caltech.edu/records/90k9v-p4f43", "eprint_id": 2624, "eprint_status": "archive", "datestamp": "2023-08-21 22:43:02", "lastmod": "2023-10-13 23:38:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Wapstra-A-H", "name": { "family": "Wapstra", "given": "A. H." } } ] }, "title": "Beta-gamma circular polarization correlation measurements", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91957 The American Physical Society. \n\nReceived 25 April 1957. \n\nThe authors are indebted to Dr. K. Alder, Dr. B. Stech, and Dr. A. Winther for helpful discussions and to Professor J. W. M. DuMond for his continual interest in this work.", "abstract": "Owing to nonconservation of parity in \u03b2 decay,(1) \u03b3 rays following \u03b2 transitions are circularly polarized. The angular distribution of circularly polarized \u03b3 rays emitted under an angle 0 with the preceding \u03b2 particles is W(0,\u00b1) = 1\u00b1A(v/c) cos0 (+ for right hand, - for left-hand circular polarization).(2)", "date": "1957-06-15", "date_type": "published", "publication": "Physical Review", "volume": "106", "number": "6", "publisher": "Physical Review", "pagerange": "1364-1366", "id_number": "CaltechAUTHORS:BOEpr57b", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr57b", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.106.1364", "primary_object": { "basename": "BOEpr57b.pdf", "url": "https://authors.library.caltech.edu/records/90k9v-p4f43/files/BOEpr57b.pdf" }, "resource_type": "article", "pub_year": "1957", "author_list": "Boehm, F. and Wapstra, A. H." }, { "id": "https://authors.library.caltech.edu/records/00nhk-5f634", "eprint_id": 2254, "eprint_status": "archive", "datestamp": "2023-08-21 22:42:01", "lastmod": "2023-10-13 23:17:21", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } } ] }, "title": "Isomer in iridium-193", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91957 The American Physical Society. \n\nReceived 31 October 1956. \n\nWe wish to thank Professor J. W. M. DuMond for his interest in this work and Professor S. A. Moszkowski and Dr. E. N. Hatch for helpful discussions.", "abstract": "An 80.19-kev transition with a half-life of 11.9 days and M4 multipolarity has been observed in a neutron-irradiated sample of iridium. The corresponding isomeric state has been assigned to Ir193, which is produced by two successive neutron captures in Ir191. A pile-neutron capture cross section of 1500 barns is found for Ir192.", "date": "1957-02-01", "date_type": "published", "publication": "Physical Review", "volume": "105", "number": "3", "publisher": "Physical Review", "pagerange": "974-976", "id_number": "CaltechAUTHORS:BOEpr57a", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr57a", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.105.974", "primary_object": { "basename": "BOEpr57a.pdf", "url": "https://authors.library.caltech.edu/records/00nhk-5f634/files/BOEpr57a.pdf" }, "resource_type": "article", "pub_year": "1957", "author_list": "Boehm, F. and Marmier, P." }, { "id": "https://authors.library.caltech.edu/records/5gewe-7ar50", "eprint_id": 2621, "eprint_status": "archive", "datestamp": "2023-08-21 22:41:05", "lastmod": "2023-10-13 23:38:22", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hatch-E-N", "name": { "family": "Hatch", "given": "E. N." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } }, { "id": "DuMond-J-W-M", "name": { "family": "DuMond", "given": "J. W. M." } } ] }, "title": "Rotational and intrinsic levels in Tm169 and Lu175", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91956 The American Physical Society. \n\nReceived 23 July 1956. \n\nWe wish to thank Dr. Steven A. Moszkowski for many helpful discussions. We also wish to acknowledge the contribution of Mr. H. Henrikson in designing and constructing the low-energy semicircular beta-ray spectrometer.", "abstract": "Nuclear levels in Tm169 excited by electron capture of Yb169, and levels in Lu175 excited by both beta decay of Yb175 and electron capture of Hf175 have been studied by using the curved-crystal gamma-ray spectrometer and the ring-focusing beta-ray spectrometer, as well as a semicircular beta-ray spectrometer for low energies. From the precision energies and the multipolarity determinations, the levels in Tm169 have the following energies in kev, and spin and parity assignments: A (ground state) (\u00bd+), B 8.42 (3/2+), C 118.20 (5/2+), D 138.95 (7/2+), E 316.19 (7/2+), F 379.31 (7/2-), G 472.91 (9/2-). Levels A, B, C, and D are members of a rotational band whose characteristic constants are given. Levels E and F are interpreted as particle excitations and level G as a rotational level based on the state F. The Lu175 excited states have the following energies in kev, spins, and parities: A (ground state) (7/2+), B 113.81 (9/2+), C 251.46 (11/2+), D 343.40 (5/2+), E 396.31 (9/2-), F 432.76 (7/2+), G 504.7 (1/2+). A, B, and C form a rotational band for which the characteristic constants are given. Some features of the levels and transition probabilities are discussed and compared with the unified model. A brief survey of second-order rotational energy constants and of intrinsic excitation levels is given.", "date": "1956-11-01", "date_type": "published", "publication": "Physical Review", "volume": "104", "number": "3", "publisher": "Physical Review", "pagerange": "745-752", "id_number": "CaltechAUTHORS:HATpr56", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:HATpr56", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.104.745", "primary_object": { "basename": "HATpr56.pdf", "url": "https://authors.library.caltech.edu/records/5gewe-7ar50/files/HATpr56.pdf" }, "resource_type": "article", "pub_year": "1956", "author_list": "Hatch, E. N.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/82y45-r5e12", "eprint_id": 2620, "eprint_status": "archive", "datestamp": "2023-08-21 22:39:49", "lastmod": "2023-10-13 23:38:18", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } } ] }, "title": "Gamma transitions in Ta181", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91956 The American Physical Society. \n\nReceived 26 March 1956. \n\nThe authors wish to thank Dr. J. W. M. DuMond for his interest in this work, Dr. S. A. Moszkowski for helpful discussions, and Mr. E. N. Hatch for aid in measurements with the gamma spectrometer.", "abstract": "The nuclear spectrum of Ta181 has been investigated. The excited levels have energies of 136.25, 482.0, 615.0, 618.9, and 958.0 kev. The gamma-ray energies are 3.9, 133.02, 136.25, 136.86, 345.85, 476.0, 482.0, and 615.5 kev. Multipolarities for the gamma rays are given and spin assignments to the levels are proposed.", "date": "1956-07-15", "date_type": "published", "publication": "Physical Review", "volume": "103", "number": "2", "publisher": "Physical Review", "pagerange": "342-343", "id_number": "CaltechAUTHORS:BOEpr56", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr56", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.103.342", "primary_object": { "basename": "BOEpr56.pdf", "url": "https://authors.library.caltech.edu/records/82y45-r5e12/files/BOEpr56.pdf" }, "resource_type": "article", "pub_year": "1956", "author_list": "Boehm, F. and Marmier, P." }, { "id": "https://authors.library.caltech.edu/records/qfzr9-x7t81", "eprint_id": 1066, "eprint_status": "archive", "datestamp": "2023-08-21 22:37:42", "lastmod": "2023-10-13 22:06:58", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Baggerly-L-L", "name": { "family": "Baggerly", "given": "L. L." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "DuMond-J-W-M", "name": { "family": "DuMond", "given": "J. W. M." } } ] }, "title": "Decay of Ir192", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91955 The American Physical Society \n\nWork supported in part by the U. S. Atomic Energy Commission. We wish to acknowledge the assistance of E. Hatch, S. Raff, and P. Snelgrove in the collection of data, and of F. Humphrey for chemical separations.", "abstract": "A study has been made of the gamma radiation following the decay of Ir192. The energies, intensities, internal conversion coefficients and multipolarities of the gamma transitions have been determined. Energy level schemes for the daughter nuclei, Pt192 and Os192, are proposed. The spins and parities of most of the levels are given.", "date": "1955-12-01", "date_type": "published", "publication": "Physical Review", "volume": "100", "number": "5", "publisher": "Physical Review", "pagerange": "1364-1367", "id_number": "CaltechAUTHORS:BAGpr55", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BAGpr55", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.100.1364", "primary_object": { "basename": "BAGpr55.pdf", "url": "https://authors.library.caltech.edu/records/qfzr9-x7t81/files/BAGpr55.pdf" }, "resource_type": "article", "pub_year": "1955", "author_list": "Baggerly, L. L.; Marmier, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/mkeqm-7q553", "eprint_id": 1065, "eprint_status": "archive", "datestamp": "2023-08-21 22:35:32", "lastmod": "2023-10-13 22:06:55", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Murray-J-J", "name": { "family": "Murray", "given": "J. J." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } }, { "id": "DuMond-J-W-M", "name": { "family": "DuMond", "given": "J. W. M." } } ] }, "title": "Decays of Ta182 and Ta183", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91955 The American Physical Society \n\nWork supported by Office of Ordnance Research (U. S. Army), and the U. S. Atomic Energy Commission, and performed in part with equipment built with funds granted by the Research Corporation of America. \n\nA portion of this work was submitted by Joseph J. Murray as a Ph.D. thesis, California Institute of Technology, 1954 (unpublished). \n\nWe gratefully acknowledge the efforts of Dr. W. B. Lewis in arranging for irradiations in the Materials Testing Reactor, Arco, Idaho, under the auspices of the Phillips Petroleum Company. \n\nWe wish to acknowledge the vaulable contribution of Mr. P. Snelgrove. Also we wish to thank Professor A. Bohr for many helpful discussions.", "abstract": "The beta - decays of Ta182 and Ta183 into excited states of W182 and W183 have been studied using a curved crystal gamma-ray diffraction spectrometer and a homogeneous field, ring focusing beta-ray spectrometer. In each case de-excitation of the daughter nucleus gives rise to complex gamma-ray and conversion electron spectra. Energies and relative intensities of gamma rays and conversion lines arising from 27 transitions in W182 and 29 transitions in W183 are presented. Internal conversion coefficients and multipolarities have been deduced for most of the transitions and together with the gamma-ray energies form the basis of decay schemes proposed for both W182 and W183. The two decays are reported together because of the close experimental relationship which existed between them as a consequence of the method used for their production, namely, simultaneous production of Ta182 by single neutron capture and Ta183 by double neutron capture from stable Ta181. A corollary result is the value 1.3 x 10^4 barns for the thermal neutron cross section of Ta182.\n\nAn interpretation of these results on W182 in terms of collective rotational motion has been given by A. Bohr and collaborators [Kgl. Danske Videnscab. Selskab, Mat.-fys. Medd. 29, No. 9 (1955)].", "date": "1955-02-15", "date_type": "published", "publication": "Physical Review", "volume": "97", "number": "4", "publisher": "Physical Review", "pagerange": "1007-1016", "id_number": "CaltechAUTHORS:MURpr55", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MURpr55", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.97.1007", "primary_object": { "basename": "MURpr55.pdf", "url": "https://authors.library.caltech.edu/records/mkeqm-7q553/files/MURpr55.pdf" }, "resource_type": "article", "pub_year": "1955", "author_list": "Murray, J. J.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/9m43j-kcv90", "eprint_id": 1064, "eprint_status": "archive", "datestamp": "2023-08-21 22:35:06", "lastmod": "2023-10-13 22:06:53", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } } ] }, "title": "Energy Levels of Hf177", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91955 The American Physical Society \n\nAssisted by contracts with the U. S. Atomic Energy Commission and the Office of Ordnance Research (U. S. Army). We wish to thank Dr. R. B. Day, Los Alamos Scientific Laboratory, who suggested these measurements and made the arrangements for the procurement of the source.", "abstract": "The nuclear spectrum of Lu177 has been investigated. Three excited levels of Hf177 have energies of 112.97 kev, 249.69 kev, and 321.33 kev. A decay scheme is proposed.", "date": "1955-01-01", "date_type": "published", "publication": "Physical Review", "volume": "97", "number": "1", "publisher": "Physical Review", "pagerange": "103-104", "id_number": "CaltechAUTHORS:MARpr55", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MARpr55", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.97.103", "primary_object": { "basename": "MARpr55.pdf", "url": "https://authors.library.caltech.edu/records/9m43j-kcv90/files/MARpr55.pdf" }, "resource_type": "article", "pub_year": "1955", "author_list": "Marmier, P. and Boehm, F." }, { "id": "https://authors.library.caltech.edu/records/1q3z0-c3t48", "eprint_id": 1063, "eprint_status": "archive", "datestamp": "2023-08-21 22:34:19", "lastmod": "2023-10-13 22:06:51", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } }, { "id": "DuMond-J-W-M", "name": { "family": "DuMond", "given": "J. W. M." } } ] }, "title": "Gamma Transitions in W182", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91954 The American Physical Society \n\nDuring the preparation of the manuscript, a paper on the same subject by C. M. Fowler et al., appeared in Phys. Rev. 94, 1082 (1954), showing close agreement with the present results. \n\nAssisted by contracts with the U. S. Atomic Energy Commission and the Office of Ordnance Research.", "abstract": "[No abstract].", "date": "1954-08-01", "date_type": "published", "publication": "Physical Review", "volume": "95", "number": "3", "publisher": "Physical Review", "pagerange": "864-865", "id_number": "CaltechAUTHORS:BOEpr54b", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr54b", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.95.864", "primary_object": { "basename": "BOEpr54b.pdf", "url": "https://authors.library.caltech.edu/records/1q3z0-c3t48/files/BOEpr54b.pdf" }, "resource_type": "article", "pub_year": "1954", "author_list": "Boehm, F.; Marmier, P.; et el." }, { "id": "https://authors.library.caltech.edu/records/k37t6-gse45", "eprint_id": 1061, "eprint_status": "archive", "datestamp": "2023-08-21 22:32:13", "lastmod": "2023-10-13 22:06:46", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Wu-C-S", "name": { "family": "Wu", "given": "C. S." } } ] }, "title": "Internal Bremsstrahlung and Ionization Accompanying Beta Decay", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91954 The American Physical Society \n\nThe authors wish to express their thanks to Dr. E. Nagel and Dr. L. Lidofsky for their valuable cooperaqtion throughout the investigation and to Professor W. W. Havens, Jr., for his constant interest in the experiment.\n\nFelix Boehm, Boese Postodoctoral Fellow of Columbia University (1952-1953), presently at California Institute of Technology, Pasadena, California.", "abstract": "Internal bremsstrahlung spectra from S35 and Pm147 have been investigated with the NaI scintillation spectrometer. Both the absolute cross section of production and the energy distribution agree with theoretical predictions. The theoretical internal bremsstrahlung spectrum of RaE was calculated by using both the observed forbidden beta spectrum and an allowed beta distribution. No significant differences in shape were found in these two cases except in the absolute cross section of production. \n\nThe ionization accompanying beta decay was studied in the case of RaE and also in Pm147 by measuring the characteristic x-rays in an NaI scintillation counter as well as in a proportional counter spectrometer. Both K and L radiations were observed, and their absolute cross sections were compared with the theoretical calculations of Migdal, Feinberg, and Levinger. Because of the approximate nature of the theoretical calculations, the agreement between the theoretical and experimental results is considered satisfactory.", "date": "1954-02-01", "date_type": "published", "publication": "Physical Review", "volume": "93", "number": "3", "publisher": "Physical Review", "pagerange": "518-523", "id_number": "CaltechAUTHORS:BOEpr54a", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr54a", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.93.518", "primary_object": { "basename": "BOEpr54a.pdf", "url": "https://authors.library.caltech.edu/records/k37t6-gse45/files/BOEpr54a.pdf" }, "resource_type": "article", "pub_year": "1954", "author_list": "Boehm, F. and Wu, C. S." }, { "id": "https://authors.library.caltech.edu/records/w5a6t-t4g52", "eprint_id": 1062, "eprint_status": "archive", "datestamp": "2023-08-21 22:30:23", "lastmod": "2023-10-13 22:06:49", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wu-C-S", "name": { "family": "Wu", "given": "C. S." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Nagel-E", "name": { "family": "Nagel", "given": "E." } } ] }, "title": "Radiations from RaD and RaE", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91953 The American Physical Society \n\nThe authors are indebted to Dr. L. Lidofsky and Mr. P. Macklin for their valuable help at the beginning of the work. The chemical separation and purification of RaE and RaD were kindly performed by Mr. E. Alperovitch and A. Zuper. The constant interest and encouragement from Professor W. W. Havens, Jr., is gratefully acknowledged.", "abstract": "The electron and gamma-spectra from RaD and RaE have been thoroughly investigated. The gamma-radiation from RaD was studied with both krypton and argon proportional counters with brass and aluminum cathodes. The L alpha, L beta, and L gamma radiations of Bi were observed and identified with a critical absorber. The intensity ratios of L alpha:L beta:L gamma are 1:1:0.2. The previously reported 7.8-kev (10 percent) line was not found but could be strongly excited by copper backing. The weak 23-kev line (10^-3 per disintegration in our measurements) could be contributed from the piling effect of the detecting system.\n\nThe conversion electrons of RaD were investigated in a solenoid magnetic spectrometer to obtain the L and (M+N) conversion coefficients. The results are: NeL / N beta =64 percent, NeM+N / N beta =21 percent, NeL+M+N / N beta =(85\u00b15) percent.\n\nThe conversion electrons of RaD were again investigated with a 180\u00b0 beta-spectrometer with a resolution of 0.8 percent and a counter window of ~6 \u00b5g/cm2. The LI, LII, and LIII conversion lines of the 46.5-kev gamma-ray were resolved. The ratio of LI:LII:LIII:MI-III:MIV-V:NI-V:NVI-VIII+0 are 1:0.075:0.007: 0.25:0.006:0.07:0.007. From the ratios of the L-subshell conversion electrons, the 46.5-kev transition is interpreted as an M1 type.\n\nThe upper limit of the intensity of the reported lines at 42 kev, at 37 kev, and at 31 kev must be less than 0.5 percent per disintegration if the same conversion coefficient is assumed.\n\nThe unconverted 46.5-kev gamma-radiation is 0.07\u00b10.02 per disintegration. Thus the excited state of 46.5 kev in RaE can account for (92\u00b15) percent of the disintegrations.\n\nNeither internal conversion electrons nor nuclear gamma-radiations are found in RaE. A faint x-ray (~80 kev) of the order of 10-4 per disintegration due to the ionization effect was observed in RaE.\n\nA brief discussion of the decay scheme of RaD and the possible spin assignments of various levels is included.", "date": "1953-07-15", "date_type": "published", "publication": "Physical Review", "volume": "91", "number": "2", "publisher": "Physical Review", "pagerange": "319-327", "id_number": "CaltechAUTHORS:WUCpr53", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:WUCpr53", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.91.319", "primary_object": { "basename": "WUCpr53.pdf", "url": "https://authors.library.caltech.edu/records/w5a6t-t4g52/files/WUCpr53.pdf" }, "resource_type": "article", "pub_year": "1953", "author_list": "Wu, C. S.; Boehm, F.; et el." }, { "id": "https://authors.library.caltech.edu/records/68j10-xtg15", "eprint_id": 1060, "eprint_status": "archive", "datestamp": "2023-08-21 22:30:03", "lastmod": "2023-10-13 22:06:44", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Peaslee-D-C", "name": { "family": "Peaslee", "given": "D. C." } }, { "id": "Perez-Mendez-V", "name": { "family": "Perez-Mendez", "given": "V." } } ] }, "title": "Search for 1-Mev Gamma from N16 Decay", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91953 The American Physical Society \n\nThe authors thank Dr. V. L. Telegdi for discussions, Professor W. W. Havens for help with the cyclotron, and Mr. V. Fitch for the loan of the NaI crystal. \n\nWork supported by the research program of the U. S. Atomic Energy Commission.", "abstract": "In the beta-decay of N16 to the 1- (7.1-Mev) and 3- (6.1-Mev) excited states of O16, respectively, a discrepancy exists between the branching ratio of about 1:1 determined from absorption measurements on the beta-spectrum, and the ratio of about 1:12 from measurement of the associated gamma-ray intensities. If both measurements are to be reconciled, the most likely possibility is a strong E2 gamma-ray transition from the 7.1-Mev to the 6.1-Mev level. The likelihood that this E2could give serious competition to the normal 7.1-Mev E1 ground state transition is enhanced by the isotopic spin selection rule forbidding E1 transitions with [delta]T = N - Z = 0. In order to explain the quantitative discrepancy in this way, however, this selection rule would have to be much stronger than suggested by simple estimates.", "date": "1953-06-15", "date_type": "published", "publication": "Physical Review", "volume": "90", "number": "6", "publisher": "Physical Review", "pagerange": "1119-1120", "id_number": "CaltechAUTHORS:BOEpr53", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr53", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.90.1119.2", "primary_object": { "basename": "BOEpr53.pdf", "url": "https://authors.library.caltech.edu/records/68j10-xtg15/files/BOEpr53.pdf" }, "resource_type": "article", "pub_year": "1953", "author_list": "Boehm, F.; Peaslee, D. C.; et el." }, { "id": "https://authors.library.caltech.edu/records/3xyeq-kxy13", "eprint_id": 1059, "eprint_status": "archive", "datestamp": "2023-08-21 22:17:27", "lastmod": "2023-10-13 22:06:42", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Blaser-J-P", "name": { "family": "Blaser", "given": "J. P." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } }, { "id": "Preiswerk-P", "name": { "family": "Preiswerk", "given": "P." } } ] }, "title": "Nuclear Gamma-Radiation of Cu61", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91950 The American Physical Society \n\nWe wish to thank Professor Scherrer for his kind interest in and active support of this work.", "abstract": "The positron spectrum of Cu61 has been examined recently by Cook and Langer with a large magnetic spectrometer. The experimental curves of these authors show a deviation from the Fermi distribution which is much larger than for Cu64 and it seems possible that not all of this deviation arises from the instrumental factors. It is pointed out by different authors that Cu61 does not emit nuclear gamma-rays which means that the spectrum of Cu61 must be simple. On the other hand the measurements of Cook and Langer can hardly be understood without the assumption of a complex spectrum. To examine this discrepancy, we started a search for gamma-radiation in Cu61.", "date": "1950-01-15", "date_type": "published", "publication": "Physical Review", "volume": "77", "number": "2", "publisher": "Physical Review", "pagerange": "295-296", "id_number": "CaltechAUTHORS:BOEpr50", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BOEpr50", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.77.295", "primary_object": { "basename": "BOEpr50.pdf", "url": "https://authors.library.caltech.edu/records/3xyeq-kxy13/files/BOEpr50.pdf" }, "resource_type": "article", "pub_year": "1950", "author_list": "Boehm, F.; Blaser, J. P.; et el." }, { "id": "https://authors.library.caltech.edu/records/zbpva-g9y67", "eprint_id": 1057, "eprint_status": "archive", "datestamp": "2023-08-21 22:14:40", "lastmod": "2023-10-13 22:06:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Blaser-J-P", "name": { "family": "Blaser", "given": "J. P." } }, { "id": "Boehm-F", "name": { "family": "Boehm", "given": "F." } }, { "id": "Marmier-P", "name": { "family": "Marmier", "given": "P." } } ] }, "title": "The Positron Decay of F18", "ispublished": "pub", "full_text_status": "public", "note": "\u00a91949 The American Physical Society \n\nReceived 2 May 1949", "abstract": "[No abstract.]", "date": "1949-06-15", "date_type": "published", "publication": "Physical Review", "volume": "75", "number": "12", "publisher": "Physical Review", "pagerange": "1953", "id_number": "CaltechAUTHORS:BLApr49", "issn": "0031-899X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:BLApr49", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1103/PhysRev.75.1953", "primary_object": { "basename": "BLApr49.pdf", "url": "https://authors.library.caltech.edu/records/zbpva-g9y67/files/BLApr49.pdf" }, "resource_type": "article", "pub_year": "1949", "author_list": "Blaser, J. P.; Boehm, F.; et el." } ]