Abstract
Lifetimes of excited states in , populated in the β decay of , have been measured using the advanced time-delayed (t) method. Half-lives of 14 states have been determined including 11 of them for the first time. Twenty-seven new γ lines have been introduced into the β-decay scheme of based on results of coincidence measurements. Reduced transition probabilities have been determined for more than 70 γ transitions in . Average values of 0.029(1), 0.077(3), and 0.024(5) fm have been deduced for the lowest , and parity partner bands, respectively. Excited states in and experimental transition rates have been interpreted within the quasiparticle-plus-phonon model. The half-life of the 3.5-eV, isomeric state is predicted to be about 10 h. Potential energy surfaces on the () plane for the lowest single quasiparticle configurations in have been calculated using the Strutinsky method.
- Received 28 December 2005
DOI:https://doi.org/10.1103/PhysRevC.73.044326
©2006 American Physical Society