Abstract
High-spin states in were populated in the reaction and the Gammasphere detector array was used to measure -ray coincidences. Both positive- and negative-parity bands, including bands with chiral configurations, have been extended to higher spin, where a shape change has been observed. The configurations of the bands before and after the alignment are discussed within the framework of the cranked Nilsson-Strutinsky model. The calculations suggest that the nucleus undergoes a shape transition from triaxial to prolate around spin of the positive-parity states. The alignment gain of , observed in the positive-parity bands, is due to partial alignment of several valence nucleons. This indicates the absence of band crossing due to paired nucleons in the bands.
11 More- Received 18 December 2017
DOI:https://doi.org/10.1103/PhysRevC.97.024323
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