Five-valence-proton N=82 isotone {sup 137}Cs
- Chemistry Department, Purdue University, West Lafayette, Indiana 47907 (United States)
- Chemistry Departments, Purdue University, West Lafayette, Indiana 47907 (United States)
- Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
- Accelerator Laboratory, Department of Physics, University of Jyvaeskylae, FIN-40351, Jyvaeskylae (Finland)
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 95720 (United States)
- Department of Physics Frescati, Royal Institute of Technology, S-10405 Stockholm (Sweden)
Yrast excitations in the N=82 isotone {sup 137}Cs have been identified for the first time in thick-target {gamma}-ray coincidence measurements for the system {sup 232}Th+{sup 136}Xe using the Gammasphere array. The {sup 137}Cs nuclei were produced in deep inelastic one-proton-transfer reactions. By-products of the main investigation were two well-developed rotational bands which were identified in heavy reaction partner products complementary to {sup 137}Cs and are tentatively assigned to the little studied nucleus {sup 231}Ac. There was no difficulty in placing the 11 observed {sup 137}Cs transitions in a yrast level scheme extending to an I{sup {pi}}=(31/2{sup {minus}}) level at 5494 keV. Interpretation was also straightforward, since the experimental level energies are in close agreement with results of shell model calculations performed earlier using empirical single particle energies and interaction matrix elements derived from experimental data for other N=82 isotones. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 341430
- Journal Information:
- Physical Review, C, Vol. 59, Issue 6; Other Information: PBD: Jun 1999
- Country of Publication:
- United States
- Language:
- English
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