Spectroscopy of N=82,83 Xe-136,Xe-137 isotopes from Cm-248 fission

Prompt gamma-ray cascades in neutron-rich nuclei around doubly magic Sn-132 have been studied at Eurogam II using a Cm-248 fission source. Here we report results for the four-valence-proton N=82 nucleus Xe-136 and for its N=83 neighbor Xe-137. For both nuclei, the yrast level spectra have been considerably extended, and empirical nucleon-nucleon interactions have been used to assign probable shell model configurations for most of the observed levels.

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