Transition probabilities in 189Os

Levels in189Os populated in the decay of189Re

“…The present results are in general agreement with the multipolarities proposed by Malmskog et al [6]. The ?-ray at 149.88 keV was assigned a multipolarity of type E2 by Malmskog et aL [6]. The present study suggests that this ?-ray is a E2(M1) mixed type transition.…”

“…The 185.85 keV y-ray was chosen to normalize the relative photon intensities to the conversion electron intensities. Malmskog et aL [6] concluded that the 185.85 keV y-ray was M I from the internal conversion coefficient. Crasemann et al [I] and Harmatz et al [4] also found this ?-ray to be M1 by the k/L~ subshell ratio.…”

“…All beta transitions are consistent with a first forbidden unhindered or allowed hindered transition. The lifetimes of the excited levels as reported by Malmskog et al [6] are included on the decay scheme. The transitions indicated by dashed lines on the decay scheme were not observed in this study and are taken from Ref.…”

“…The relative photon intensities for the 69.59 and 95.23 keV y-rays were computed from the multipolarities proposed in Ref. [6]. (1) 4(2) 275.8 (6) 32 (3) 365.7 (7) 6(2) 396.8 (7) 9 (2) …”

“…Several research groups [4,5] have studied the decay of 13.3-d ~S9Ir to excited levels in ~89Os. The most recent study of ~89Os levels was made by Malmskog et aL [6] where isotopically separated sources of ~89Ir were produced at CERN and the radioactive decay v-rays and conversion electrons were measured and the lifetimes of excited 189Os levels were determined. Coulomb excitation measurements have also revealed properties of ~S9Os levels [7,8].…”