Level structure of 92Rh: Implications for the Two-proton Decay of 94mAg

The 21+ isomer in 94Ag has recently been reported to have a two-proton decay branch to 92Rh. We have populated 92Rh through the 40Ca(58Ni,alphapn) reaction at 240 MeV, and have performed detailed spectroscopic measurements of the levels, finding new states and measuring angular distributions of gamma rays. We find no evidence for the states reported to be populated by the two-proton decay of 94Agm. The calculated Q-value for the two-proton decay implies that this process directly feeds low-lying yrast, or near-yrast, states in 92Rh, which is very difficult to reconcile with our observations. Several scenarios for the population of 92Rh are discussed, none of which appears to be satisfactory.