The levels of ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$ have been investigated via the ${}_{}{}^{61}{}_{}{}^{}\mathrm{Ni}(\alpha ,n\gamma ){}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$ reaction up to 3.4 MeV excitation. The level scheme which has been obtained includes most of the previously reported levels. The lifetimes of 18 levels in ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$ have been measured by the Doppler shift attenuation method at bombardment energies between 6.4 and 8.0 MeV.

NUCLEAR REACTIONS ${}_{}{}^{61}{}_{}{}^{}\mathrm{Ni}(\alpha ,n\gamma )$, $E_{\alpha }=6.4\mathrm{}-8.0$ MeV, enriched targets, measured $E_{\gamma }$, $I_{\gamma }$, $\Delta E_{\gamma }\left(\tau \right)$ confirmed ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$ levels, deduced $\tau$.

• Received 19 January 1976

DOI:https://doi.org/10.1103/PhysRevC.13.2237