Population of the 2.37-MeV 0 + Level inZn66byCu66

Abstract

The decay of ${}_{}{}^{66}{}_{}{}^{}\mathrm{Cu}$ to ${}_{}{}^{66}{}_{}{}^{}\mathrm{Zn}$ has been studied with Ge(Li) detectors. The following $\gamma$ rays were observed (energies in keV and intensities in parentheses): 833.0±1.0 (1.7±0.4), 1039.2±0.2 (100), and 1332.5±1.5 (0.032±0.006). These depopulate the following levels in ${}_{}{}^{66}{}_{}{}^{}\mathrm{Zn}$: 1039.2±0.2, 2+; 1872.2±1.0, 2+; and 2371.7±1.5, 0+. The spin of the 2372-keV level was determined to be zero by $\gamma -\gamma$ directional correlation studies of the 1039.2-1332.5-keV cascade. The $A_2$ and $A_4$ values obtained are 0.49±0.32 and 1.16±0.44, respectively.