Ddecay of Re 188

Abstract

The gamma rays in Os 188 following beta decay of 18-h Re 188 have been studied using coincidence and directional correlation techniques. The results agree with the principal features of the decay scheme proposed by Johns et al. 1). A number of new, weak transitions are observed and an additional level is proposed at 1.750 MeV. Directional correlation measurements were made on six cascades. From the directional correlation measurements, spins 2, 2, 0, 2, 0, 2 are assigned to the levels at 0.155 MeV, 0.633 MeV, 1.086 MeV, 1.461 MeV, 1.765 MeV and 1.941 MeV, respectively. The 0.478-MeV gamma ray is a dipole--quadrupole mixture with Q ≦ 99%. The 0.828-MeV and 1.308-MeV gamma rays are pure dipole.