Particle-core coupling inPd:101−105The rotational model at intermediate deformation

Abstract

Recent ($\mathrm{HI},\mathrm{xn}\gamma$) results on the levels of ${}_{}{}^{101,103,105}{}_{}{}^{}\mathrm{Pd}$ have been analyzed using the Nilsson model with Coriolis coupling at intermediate deformation ($\delta \simeq 0.12$). A variable moment of inertia treatment of the Nilsson basis was found to be necessary. With such a treatment the decoupled ${11/2}^{-}$ and ${7/2}^{+}$ bands of "favored states" are well reproduced for all three nuclei. In addition, the decoupled ($\Delta I=2\mathrm{}$) character of the ${5/2}^{+}$ ground-state band in ${}_{}{}^{101}{}_{}{}^{}\mathrm{Pd}$ is explained, as well as its transition to a conventional $\Delta I=1\mathrm{}$ band in ${}_{}{}^{105}{}_{}{}^{}\mathrm{Pd}$. Some of the other, "unfavored" states in these nuclei are also explained; and single-nucleon transfer spectroscopic factors and relative $\gamma$-ray branching are also discussed.