In order to study high-spin states in beta-stable and neutron-rich nuclei, in-beam gamma-ray spectroscopy was performed following triton-induced reactions on heavy nuclei. Initial studies on isotopically pure targets of ('208)Pb confirm that the dominate reaction for 10-16 MeV tritons is compound nucleus formation, followed by emission of two neutrons. The (t,2n) reaction was found to populate low-spin states as well as high-spin states, and to sufficiently align the high-spin states so that information on transition multipolarities can be obtained from gamma-ray angular distribution measurements. Preliminary experiments on ('232)Th show that for compound nuclei produced by triton bombardment of actinide targets, decay by neutron emission competes favorable with fission, so that conversion electron spectroscopy following (t,xn) reactions may be useful for studying actinide nuclei. / Triton bombardment of isotopically pure ('196)Pt and ('198)Pt targets was used to study ('197)Au and ('199)Au, produced by the (t,2n) reaction. Excitation function, pulsed beam, and gamma-gamma coincidence experiments were performed on both targets, and gamma-ray angular distributions were measured in ('199)Au. Level schemes constructed from this data show that the systematic trends observed in the lighter odd-mass gold nuclei continue in ('197)Au, but deviations in these trends occur in ('199)Au. A 6 (+OR-) 2 ns isomer seen in ('197)Au is believed to be a 2 1/2+, three particle state. The theory which best explains the results of these experiments is the cluster-vibration model, as only this model correctly predicts the large level density of negative-parity states found at excitation energies of 1-2 MeV. / Source: Dissertation Abstracts International, Volume: 43-03, Section: B, page: 0722. / Thesis (Ph.D.)--The Florida State University, 1982.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_74800 |
| Contributors | NAIL, THOMAS WILLIAM., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 238 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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