Excited states in $\sp{82}$Y have been investigated via the $\rm \sp{58}Ni(\sp{28}Si,\ 3{\it pm\/})\sp{82}Y$ and $\rm \sp{58}Fe(\sp{29}Si,\ {\it p\/}2{\it n\/})\sp{82}Y$ reactions using beams provided by the Florida State University Tandem-LINAC with energies of 95 to 135 MeV. Particle-$\gamma$ coincidences with a full-sphere charged particle detector and an excitation curve were employed to assign $\gamma$ rays to $\sp{82}$Y. The full sphere charged particle detector was developed and tested as a part of this dissertation project. The $\rm \sp{56}Fe(\sp{29}Si,\ {\it p\/}2{\it n\/})\sp{82}Y$ reaction at 95 MeV was employed to measure $\gamma$-$\gamma$ coincidences with 5 Compton-suppressed Ge detectors. Lifetimes in the ns and ps time ranges were measured using direct timing and the Doppler-shift attenuation method. A level scheme with 39 states was constructed up to tentative spins and parities of (15$\sp-)$ and (21$\sp+).$ In the positive parity yrast band a signature inversion and a phase reversal in the signature at $I = 10\ \hbar$ were observed. The B(M1) strengths in this band alternate with signature between about 0.1 and 1.0 $\mu\sbsp{N}{2}.$ The B(E2) strengths are in good agreement with those predicted by Hartree-Fock-Bogolyubov calculations. Particle-rotor calculations indicate a prolate or triaxial shape for the positive parity band. / Source: Dissertation Abstracts International, Volume: 54-04, Section: B, page: 2033. / Major Professor: Samuel L. Tabor. / Thesis (Ph.D.)--The Florida State University, 1993.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_76915 |
| Contributors | Womble, Phillip Curtis., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 149 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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