Excited states in the doubly magic nucleus 50132Sn82

The half lives of the levels at 4714 keV and 4415 keV in 132Sn have been determined to (20.2 +- 0.8) ns and (4.0 +- 0.3) ns, respectively. The transition probabilities from both half lives agree well with the theoretical predictions and, thereby, provide information on the structure of the positive parity states in 132Sn. New excited states have been identified from γγ coincidence measurements. Strong beta feeding to a state at 7210 keV was established. This level is interpreted as a 6- state formed after a πgsub(9/2)-1 → νgsub(7/2)-1 GT β- transition from the 7- ground state of 132In. The deexcitation of the 7210 keV state passes through a 4351 keV state, providing support for a 3- assignment of this level. (author)