Abstract
The two-neutrino double-β decay matrix elements and half-lives of were calculated within a shell-model approach for transitions to the ground state and to the first excited state of . We use the full model space and the GXPF1A interaction, which was recently proposed to describe the spectroscopic properties of the nuclei in the nuclear mass region –66. Our results are yr and yr. The result for the decay to the ground state is in good agreement with experiment. The half-life for the decay to the state is two orders of magnitude larger than that obtained previously.
- Received 25 October 2006
DOI:https://doi.org/10.1103/PhysRevC.75.034303
©2007 American Physical Society