Further evidence for particle-vibration coupling among the positive parity states of65,67Zn

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Abstract
The structures of the nuclei 65,67Zn have been investigated by the techniques of gamma -ray spectroscopy in conjunction with the reactions 62,64Ni( alpha ,n)65,67Zn. Gamma-gamma coincidence measurements and yield curve measurements have been used to elucidate the decay schemes. Measurements of gamma -ray angular distributions and linear polarizations have been used to determine mixing ratios for the decays of several levels in both nuclei and to make spin assignments to the following levels in 65Zn: 1.958 (7/2+), 2.054 (13/2+), 2.135 (9/2+), 2.138 (11/2+) and in 67Zn: 0.979 (5/2+), 1.603 (7/2+), 1.640 (13/2+), 1.732 (11/2+), 1.782 (3/2,5/2)+, 1.807 (9/2+). Lifetime measurements have been made using the Doppler-shift attenuation method, and electromagnetic multipole transition strengths have been deduced. The data provide further evidence for the existence of particle-vibration coupling in this mass region.

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