Abstract
The low-lying structure of has been studied following decays of the neutron-rich mother nuclei produced following the projectile fragmentation of a 1-GeV-per-nucleon primary beam on a natural beryllium target at the GSI Fragment Separator. The -decay half-lives of , , and have been measured, with -ray decays of low-lying states in their respective W daughter nuclei, using heavy-ion correlations and a position-sensitive silicon detector setup. The data provide information on the low-lying excited states in , , and , which highlight a change in nuclear shape at compared with that of lighter W isotopes. This evolution of ground-state structure along the W isotopic chain is discussed as evidence for a possible proton subshell effect for the 190 region and is consistent with maximization of the -softness of the nuclear potential around .
11 More- Received 18 September 2009
DOI:https://doi.org/10.1103/PhysRevC.80.064308
©2009 American Physical Society