Abstract

Electromagnetic decay properties for seventeen states in 61Ni have been examined by means of the 58Fe(α,nγ) 61Ni reaction with E α = 8 MeV and the 60Ni(d, pγ) 61Ni reaction at E d = 6 MeV. Mean lifetimes were obtained with the Doppler-shift attenuation method. Spins, parities, and mixing ratios were determined from angular correlation studies and linear polarization measurements. The combined results permit new J π assignments of 7 2 −, 5 2 −, 7 2 −, and 9 2 + for the levels at 1016, 1611, 2020 and 2123 keV, respectively. Experimental results, including transition strengths, are compared to shell model predictions.

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