Level structure of Rh92: Implications for the two-proton decay of Ag94m

O. L. Pechenaya, C. J. Chiara, D. G. Sarantites, W. Reviol, R. J. Charity, M. P. Carpenter, R. V.F. Janssens, T. Lauritsen, C. J. Lister, D. Seweryniak, S. Zhu, L. L. Andersson, E. K. Johansson, D. Rudolph

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Abstract

The 21+ isomer in Ag94 has recently been reported to have a two-proton decay branch to Rh92. We have populated Rh92 through the Ca40(Ni58,αpn) reaction at 240 MeV, and have performed detailed spectroscopic measurements of the levels, finding new states and measuring angular distributions of γ rays. We find no evidence for the states reported to be populated by the two-proton decay of Ag94m. The calculated Q-value for the two-proton decay implies that this process directly feeds low-lying yrast, or near-yrast, states in Rh92, which is very difficult to reconcile with our observations. Several scenarios for the population of Rh92 are discussed, none of which appears to be satisfactory.

Original languageEnglish
Article number011304
JournalPhysical Review C - Nuclear Physics
Volume76
Issue number1
DOIs
StatePublished - Jul 19 2007

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