[
    {
        "name": "Mann, Frederick Michael",
        "degree": "PhD",
        "year": "1975",
        "title": "Part I. Study of Some Beta Decays in the SD Shell. Part II. Comparison of Experimental Reaction Cross Sections with the Hauser-Feshbach Model",
        "advisor": "Kavanagh, Ralph William",
        "url": "https://resolver.caltech.edu/CaltechTHESIS:03192025-222231997",
        "creators": [
            {
                "name": {
                    "family": "Mann",
                    "given": "Frederick Michael"
                },
                "id": "Mann-Frederick-Michael",
                "display_name": "Mann, Frederick Michael"
            }
        ],
        "advisors": [
            {
                "name": {
                    "family": "Kavanagh",
                    "given": "Ralph William"
                },
                "id": "Kavanagh-R-W",
                "role": "advisor",
                "display_name": "Kavanagh, Ralph William"
            }
        ],
        "committee": [
            {
                "name": {
                    "family": "Unknown",
                    "given": "Unknown"
                },
                "display_name": "Unknown, Unknown"
            }
        ],
        "option_major": [
            "physics"
        ],
        "doi": "10.7907/3ke6-7w63",
        "abstract": "<p>Part One</p>\r\n\r\n<p>The beta decays of <sup>19</sup>Ne, <sup>23</sup>Mg, <sup>27</sup>Si, <sup>37</sup>K, <sup>38</sup>K, and <sup>39</sup>Ca have\r\nbeen studied by observing the delayed gamma radiation with large vo1ume\r\nGe(Li) detectors. A pneumatic shuttle was used so that weak beta transitions\r\ncould be observed. Two previously unobserved allowed transitions\r\nhave been found, and the uncertainty for most of the previously known\r\ntransitions has been reduced. Limits for unobserved transitions have\r\nbeen strengthened. A comparison is made between the predictions of\r\nvarious nuclear models, particularly the many-particle shell model; and\r\nobserved values.</p>\r\n\r\n<p>Part Two</p>\r\n\r\n<p>Cross sections have been measured by the activation method for\r\n<sup>23</sup>Na(p,n)<sup>23</sup>Mg, <sup>35</sup>Cl(\u03b1,n) <sup>38</sup>K, and <sup>63</sup>Cu(p,n)<sup>63</sup>Zn from threshold to 11 MeV\r\nand for <sup>59</sup>Co(\u03b1,n)<sup>62</sup>Cu, <sup>63</sup>Cu(\u03b1,n)<sup>66</sup>Ga, and <sup>65</sup>Cu(\u03b1,n)<sup>68</sup>Ga from threshold\r\nto 19 MeV. The excitation functions are compared with the predictions\r\nof the Hauser-Feshbach model of nuclear reactions. If resonance effects\r\nar2 averaged, then using established parameters for the nuclear potentials\r\nand for the nuclear level densities, the predicted values are\r\nwithin a factor of 2 of the experimental values for practically all\r\ncross sections measured. For cases where direct reactions are not important,\r\nagreement to within 20% is obtained.</p>"
    }
]