Abstract
The Ba nucleus has been studied in prompt -ray spectroscopy using the EUROGAM2 Ge array. Spin and parity of the ground state has been determined to be . The unexpected, ground state results from interaction with other negative-parity configurations. A new ground-state band has been established in Ba and some previously reported levels have been arranged into a band, which may correspond to the [532] configuration. The new spin assignments in Ba suggest that the theoretical predictions of static octupole deformation in the ground state of Ba may not be be valid. No candidates for parity doublets have been found in Ba. Instead, an octupole band built on the ground state has been proposed.
- Received 14 October 2012
DOI:https://doi.org/10.1103/PhysRevC.87.031305
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