Levels of ${}_{}{}^{105}{}_{}{}^{}\mathrm{Pd}$ populated in the decay of ${}_{}{}^{105}{}_{}{}^{}\mathrm{Ag}_{}^{\mathit{m},\mathit{g}}{}_{}{}^{}$ and comparison with interacting boson-fermion model calculations

Deexcitation properties of low-spin levels in ${}_{}{}^{105}{}_{}{}^{}\mathrm{Pd}$ populated in the decay of ${}_{}{}^{105}{}_{}{}^{}\mathrm{Ag}_{}^{\mathit{m}}{}_{}{}^{}$ and ${}_{}{}^{105}{}_{}{}^{}\mathrm{Ag}_{}^{\mathit{g}}{}_{}{}^{}$ are investigated. The calculation for ${}_{}{}^{105}{}_{}{}^{}\mathrm{Pd}$ is performed in the interacting boson-fermion model (IBFM), using a nearly spherical boson core corresponding to ${}_{}{}^{104}{}_{}{}^{}\mathrm{Pd}$. As a result, we obtain an approximate quasiweak-coupling pattern, which is in contrast to previously assumed symmetric rotor model calculations. Rather good agreement between theory and experiment was obtained. The extension of the IBFM calculations to lighter N=59 isotones is consistent with the recent discovery of coexisting structures and dual double-subshell closure in respective even-even core nuclei. © 1996 The American Physical Society.