Abstract
New excited states in and are investigated by means of prompt spectroscopy of the radiation following spontaneous fission of . Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. The presence of collectivity in the isotones is confirmed by clear signatures of soft triaxial bands in both nuclei.
5 More- Received 24 March 2017
DOI:https://doi.org/10.1103/PhysRevC.95.064303
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