Abstract
Gamma decay schemes and angular distributions have been measured for g9/2 isobaric analogue resonances (IAR) in the 64,66Zn(p,γ) reactions. In 65Ga, the IAR is seen to be fragmented into four components at resonance energies ER = 6.810, 6.819, 6.830, and 6.835 MeV, and two fragments are observed in 67Ga at ER = 8.554 and 8.569 MeV. The total analogue–antianalogue M1 strengths are, respectively, 7 and 4% of the single particle estimates in 65Ga and 67Ga. These results are examined in the light of a model proposed by Aleshin. In 65Ga, the level at 1.286 MeV is determined to have a spin of 9/2 from angular distributions. This level is most likely a member of [Formula: see text] multiplet.
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