Lifetimes of levels inZn64from Doppler shift measurements via theNi61(α,n)Zn64reaction

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.