High-spin states in N=50 {sup 85}Br and {sup 87}Rb nuclei
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States)
- Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching (Germany)
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
The level structures of the N=50 {sup 85}Br and {sup 87}Rb isotopes have been studied in the fission of the compound system formed in three different heavy-ion-induced reactions. In {sup 87}Rb many states above the previously known 9/2{sup +} isomer have been established. The coupling of the odd proton occupying the g{sub 9/2} orbital to the yrast states in the {sup 86}Kr core can account for the first excited states above the isomer in {sup 87}Rb. A comparison with the first excited states above the 9/2{sup +} state in {sup 85}Kr and {sup 89}Y reveals similarities in the coupling. At higher excitations similar behavior to {sup 89}Y is observed, indicating a possible presence of neutron-core excitations. In {sup 85}Br several states up to {approx}5 MeV excitation energy have been established. Two states at {approx}2 MeV excitation energy are candidates for the 9/2{sup +} state originating from the odd proton occupying the g{sub 9/2} orbital. The experimental results for both isotopes are compared with predictions of the shell model.
- OSTI ID:
- 20698740
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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