The 1.25-MinuteRb82mDaughter of 27-DaySr82

Abstract

The 3.15-Mev positron associated with the decay of the 27-day ${\mathrm{Sr}}^{82}$ has been found to arise from the decay of a 1.25-minute metastable ${\mathrm{Rb}}^{82}$ isomer by an allowed transition to the ${\mathrm{Kr}}^{82}$ ground state. No isomeric transition to the 6.3-hour ${\mathrm{Rb}}^{82}$ ground state was observed. A tentative decay scheme and spin and parity assignments are discussed.