The levels of ${}_{}{}^{60}{}_{}{}^{}$,61Zn and ${}_{}{}^{59}{}_{}{}^{}$,60Cu have been investigated using γ-γ coincidence spectroscopy in the reactions ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$(α,n${)}^{61}$Zn at 13 MeV, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$(α,nγ${)}^{61}$Zn at 11.5, 15, and 20 MeV, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$${(}^6$Li,p2nγ${)}^{61}$Zn at 30 MeV, ${}_{}{}^{54}{}_{}{}^{}\mathrm{Fe}$${(}^{10}$B,p2nγ${)}^{61}$Zn at 45 MeV, ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{24}$Mg,2pnγ${)}^{61}$Zn at 65 and 80 MeV, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$${(}^3$He,nγ${)}^{60}$Zn at 8 and 12 MeV, ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{23}$Na,p2nγ${)}^{60}$Zn at 70 MeV, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$${(}^3$He,pnγ${)}^{59}$Cu at 12 MeV, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$(α,pnγ${)}^{60}$Cu at 20 MeV, and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{23}$Na,2pnγ${)}^{60}$Cu at 70 MeV. In the helium-induced reactions, spectra were gated with neutron coincidences. New levels have been found in all the nuclides studied, and a number of new spin assignments were made on the basis of n-γ angular correlations. The results are compared with earlier γ-ray and particle studies, and with preexisting shell-model predictions.

• Received 10 April 1989

DOI:https://doi.org/10.1103/PhysRevC.40.2310