Abstract
The Doppler shift attenuation technique was used to investigate the lifetimes of 33 states of 60Ni up to 5.6 MeV of excitation; 18 were measured for the first time. Gamma rays from the 60Ni(p,p′ψ) reaction were observed in coincidence with protons by two Ge(Li) detectors at 40° and 130° lab. We find a new doublet (3.381–3.393 MeV) and give several previously unknown ψ-ray branching ratios; the lifetimes allow one to attribute some spins or parities or to reject other assignments. In order to complement the existing information on 60Ni, we have studied the proton configuration by the 59Co( 3He,dψ) reaction. The results are different from those expected from simple 1p-1h states of the proton core; many of the levels observed are multiplets decaying by cascades.
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