Gamma rays in the ${}^{132}\mathrm{Sb}$ and ${}^{133}\mathrm{Te}N=81\mathrm{}$ isotones near doubly magic ${}^{132}\mathrm{Sn}$ have been studied at Gammasphere using a ${}^{248}\mathrm{Cm}$ fission source. Previously unknown yrast cascades in the two nuclei were identified in cross coincidence with known γ rays from complementary Rh and Ru fission fragments. The ${}^{132}\mathrm{Sb}$ levels are explained as proton-neutron hole states as well as core excited states of $2p-2h$ character, while the interpretation of the ${}^{133}\mathrm{Te}$ level scheme is mainly based on results of shell model calculations using empirical proton-proton interaction energies from ${}^{134}\mathrm{Te}$ together with estimated proton-neutron hole interactions.

• Received 20 June 2001

DOI:https://doi.org/10.1103/PhysRevC.64.054312