Spin and Parity Assignment for the 872-keV Level inGa69

We have investigated the decays of 58-min ${}_{}{}^{69g}{}_{}{}^{}\mathrm{Zn}$ and 14-h ${}_{}{}^{69m}{}_{}{}^{}\mathrm{Zn}$ with a 30-${\mathrm{cm}}^3$ Ge(Li) detector. In addition to the 438.6-keV isomeric transition in ${}_{}{}^{69}{}_{}{}^{}\mathrm{Zn}$, $\gamma$ rays of energies 318.6, 574.3, and 872.5 keV were observed. These $\gamma$ rays have been incorporated into the known level scheme of ${}_{}{}^{69}{}_{}{}^{}\mathrm{Ga}$. Our studies show that the ${\beta }^{-}$ feeding to the 872-keV level in ${}_{}{}^{69}{}_{}{}^{}\mathrm{Ga}$ is from the ${\mathrm{½}}^{-}$, ${}_{}{}^{69}{}_{}{}^{}\mathrm{Zn}$ ground state and not from the ${\frac{9}{2}}^{+}$, ${}_{}{}^{69}{}_{}{}^{}\mathrm{Zn}$ metastable state as has been reported. The present results are consistent with a ${\frac{3}{2}}^{-}$ assignment for the 872-keV level.