Abstract
Isomeric states in and , with half-lives of 150(17) ns and 500(100) ns, respectively, have been observed following the relativistic fission of . The fission fragments have been separated in a fragment separator and identified by means of energy-loss and time-of-flight techniques. In both nuclei, the ground-state configuration is calculated to have an oblate shape and the isomerism is proposed to arise due to transitions from a triaxial excited state to a low-lying oblate state.
- Received 9 September 2010
DOI:https://doi.org/10.1103/PhysRevC.82.044312
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