Searches have been made for short-lived isomers in ${}_{}{}^{180}{}_{}{}^{}\mathrm{Lu}$ suggested by the preceding paper. Samples of ${}_{}{}^{180}{}_{}{}^{}\mathrm{Lu}$ were produced via the ${}_{}{}^{180}{}_{}{}^{}\mathrm{Hf}$(n,p) reaction. Evidence for decay of a ${}_{}{}^{180}{}_{}{}^{}\mathrm{Lu}$ isomer was sought by examining the decay curves of the known ${}_{}{}^{180}{}_{}{}^{}\mathrm{Lu}$ and ${}_{}{}^{180}{}_{}{}^{}\mathrm{Hf}_{}^{\mathrm{m}}{}_{}{}^{}$ delayed γ rays, and by searching for previously unidentified delayed γ rays. No evidence for a ${}_{}{}^{180}{}_{}{}^{}\mathrm{Lu}$ isomer was observed for half-lives between 10 and 300 sec. The relevance of these observations for understanding the nucleosynthesis of ${}_{}{}^{180}{}_{}{}^{}$${\mathrm{Ta}}^{\mathrm{m}}$ is discussed.

• Received 5 August 1986

DOI:https://doi.org/10.1103/PhysRevC.34.2256