Abstract
The -ray decay of isomeric states in the even-even nucleus has been observed. The nucleus of interest was produced both by the fragmentation of and the fission of primary beams. The level scheme was unambiguously constructed based on coincidence relations in conjunction with detailed lifetime analysis employed for the first time on this nucleus. Large-scale shell-model calculations, without consideration of excitations across the shell closure, were performed and provide a consistent description of the experimental level scheme. The structure of the isomeric states and their decays exhibit coexistence of proton, neutron, and strongly mixed configurations due to interaction in overlapping orbitals for both proton and neutron holes.
- Received 24 September 2008
DOI:https://doi.org/10.1103/PhysRevC.79.011301
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