In-beam gamma-ray spectroscopy with the reactions ('54)Fe + ('28)Si and ('56)Fe + ('28)Si were used for studying high-spin states in neutron-deficient nuclei in the mass A(TURN)80 region. Measurements of gamma-ray energies, intensities, angular distributions, excitation functions, and gamma-gamma coincidence experiments were used to assign new levels in ('79)Rb and ('80)Sr. In addition a high-spin level sequence has been assigned to ('81)Sr which was not known previously. The new levels are consistent with and extend the systematics of quasi-rotational bands in this mass region. There is a steady increase in the moment of inertia both the even and odd mass Kr and Sr isotopes as the neutron number decreases from the shell closure at N = 50. / Experimental excitation functions for the reaction products produced in the ('54)Fe + ('28)Si and ('56)Fe + ('28)Si reaction, were measured from 80 to 99 MeV in 5 MeV steps. The experimental excitation functions were then compared to the compound nuclear evaporation model calculations ALICE and LILITA. The results of these calculations suggest that angular momentum effects in the exit channel are important. These calculations are very sensitive to the level density parameters and these parameters are poorly known in the mass A(TURN)80 region. Deficiencies in the calculations may possibly be explained by the uncertainties in the continuum level density parameters a. / Source: Dissertation Abstracts International, Volume: 42-08, Section: B, page: 3318. / Thesis (Ph.D.)--The Florida State University, 1981.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_74597 |
| Contributors | THEISEN, LEON VIRGIL., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 245 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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