Properties of superdeformed band population in theA≈130region

Abstract

Intensities of transitions in both yrast and excited superdeformed bands in ${}^{132}\mathrm{Ce}$ and ${}^{131}\mathrm{Ce}$ have been measured for different compound nuclear entry conditions. The reaction of ${}^{100}\mathrm{Mo}{(}^{36}\mathrm{S}$, $\mathrm{xn}$) was used at six different bombarding energies of 135, 142, 150, 155, 160, and 170 MeV, covering a wide range in compound nuclear ${\mathcal{l}}_{\mathrm{max}}$ $(47--75\ensuremath{\Elzxh})$ and excitation energy (69--95 MeV). Three superdeformed bands were populated in the reactions, namely the ${}^{132}\mathrm{Ce}$ yrast band, ${}^{131}\mathrm{Ce}$ yrast band, and the ${}^{131}\mathrm{Ce}$ excited band. Intensity measurements were made as a function of bombarding energy and various population effects were observed. Many of these effects are difficult to explain within the framework of the current picture of superdeformed band feeding.