The ${9/2}^{+}$ ground state of ${}_{}{}^{89}{}_{}{}^{}\mathrm{Mo}$ has been found to decay with a half-life of 2.15±0.20 min to the ground state and levels at 658.6, 1155, and 1272 keV in ${}_{}{}^{89}{}_{}{}^{}\mathrm{Nb}$. Spin and parity assignments are discussed as are the levels of the $N=48\mathrm{}$ and $N=52\mathrm{}$ odd $Z$ isotones.

RADIOACTIVITY ${}_{}{}^{89}{}_{}{}^{}\mathrm{Mo}_{}^g{}_{}{}^{}$ from ${}_{}{}^{92}{}_{}{}^{}\mathrm{Mo}\mathrm{}(p,p3n)\mathrm{}$, measured $t_{\frac{1}{2}}$, $E_{\gamma }$, $I_{\gamma }$. ${}_{}{}^{89}{}_{}{}^{}\mathrm{Nb}$ deduced levels. Ge detector. Enriched target.

• Received 19 August 1980

DOI:https://doi.org/10.1103/PhysRevC.23.873