Lifetimes of Rotational States From Heavy-Ion Reactions

Abstract

The half-lives of several transitions in the ground-state collective bands of $^{160}\mathrm{Er}$, $^{158}\mathrm{Er}$, and $^{156}\mathrm{Er}$ produced by ($^{40}\mathrm{Ar},4n$) reactions have been measured by a recoil-distance Doppler-shift method. These lifetimes are compared with those of several models. The mean time interval between the reaction and the population of the ground band was also determined.