The M1 strength distribution in the γ-decay of the gcase92 analogue state in 61Cu

The γ-decay of 26 resonances in the reaction ⁶⁰Ni(p, γ)⁶¹Cu in the range E_p = 3690–3790 keV has been investigated. The $\text{g}{}_{\mathrm{<mtext>9</mtext><mtext>2</mtext>}}$ isobaric analogue state (IAS) corresponding to the parent state at $\text{E}{}^1\text{= 2114}\text{keV}$ in ⁶¹Mi has been resolved into several fine structure components. The absolute strength for the transition to the antianalogue state is found to be Γ_γ = 0.24 ± 0.07 W.u. The measured M1 strength distribution for the decay of the $\text{g}{}_{\mathrm{<mtext>9</mtext><mtext>2</mtext>}}$. IAS is compared to theoretical predictions.