Half-Lives and Gamma-Ray Abundances of Several Rare-Earth Nuclides

Abstract

New half-life values are given for $^{145}\mathrm{Eu}$, $^{146}\mathrm{Gd}$, $^{149}\mathrm{Eu}$, $^{151}\mathrm{Tb}$, $^{153}\mathrm{Sm}$, $^{153}\mathrm{Tb}$, $^{153}\mathrm{Dy}$, $^{155}\mathrm{Tb}$, and $^{155}\mathrm{Dy}$. Absolute abundances are reported for prominent $\ensuremath{\gamma}$ rays associated with the decay of $^{143}\mathrm{Pm}$, $^{146}\mathrm{Gd}$, $^{149}\mathrm{Pm}$, $^{149}\mathrm{Eu}$, and $^{153}\mathrm{Dy}$.