Abstract

The $\ensuremath{\gamma}$ rays following the $\ensuremath{\beta}$ decay of mass-separated $^{137}\mathrm{Xe}$ to levels in $^{137}\mathrm{Cs}$ have been studied. Of 94 $\ensuremath{\gamma}$ rays observed, 83 were placed in a $^{137}\mathrm{Cs}$ level scheme consisting of 34 excited states up to 3976 keV. The results are compared with levels from single-proton transfer reactions and shell-model calculations.RADIOACTIVITY $^{137}\mathrm{Xe}$ [from $^{235}\mathrm{U}(n, f)$]; measured ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$, $\ensuremath{\gamma}\ensuremath{\gamma}$-coin. Ge(Li) detectors; $^{137}\mathrm{Cs}$ deduced levels, $J$, $\ensuremath{\pi}$, $log\mathrm{ft}$. Mass-separated $^{137}\mathrm{Xe}$ activity.

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