New high spin isomers obtained in thermal fission

The product nuclei following fission often are initially highly excited and have high angular momenta. As a consequence, there is a substantial probability for the population of isomeric yrast traps in the vicinity of closed shells. The excitation energies and decay properties of such isomers give important formation regarding the shell structure and interaction energies. Recent experiments at the OSIRIS mass separator have revealed a number of isomers in the 132Sn region having angular momenta exceeding 10 units. A brief presentation is given of some experimental results and their interpretation