The nucleus ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$ is predicted to be γ unstable at low spin, but γ stable at spins of 8ħ and above. In order to see if this structural change is manifested in the decay scheme, this nucleus has been studied via γγ, recoil-γ, and recoil-γγ coincidence techniques using the reaction ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$${(}^{54}$Fe,2p) at 155 MeV. Twenty new levels have been observed with spins of up to 12ħ, but no evidence is observed for the predicted onset of gamma stability.

• Received 25 April 1994

DOI:https://doi.org/10.1103/PhysRevC.50.1321