Ge(Li)-Ge(Li) Study of the Decay of 14- secXe140

The $\gamma$-ray decay of fission product ${}_{}{}^{140}{}_{}{}^{}\mathrm{Xe}$ has been studied using TRISTAN, the Ames Laboratory on-line isotope separator. Extensive coincidence data have been obtained using two Ge-(Li) detectors and a buffer tape system. 120 of the approximately 140 $\gamma$ rays observed have been placed in a level scheme for ${}_{}{}^{140}{}_{}{}^{}\mathrm{Cs}$ with 27 excited levels. The level density at low energy is quite high, with six excited levels occurring in the first 120 keV. Tentative spin-parity assignments and possible shell-model interpretations are discussed.