Half-life measurements and gamma spectroscopy in the decay184Re m →184W

Abstract

The half-lives of the intrinsic states at 1,285.8 and 1,502.2keV in as4w have been measured in the decay of lS4Re m to be 8.33 3-0.18 ~ts and 2.35 3-0.I0 ns, respectively. These half-lives determine absolute gamma-ray transition probabilities of eight transitions and yield upper limits for three transitions. The decay scheme of lS4Rem--+ls4W is improved through measurements of delayed gamma-ray spectra with a Ge(Li) detector. Spin and Nilsson model interpretations are discussed.

Low-Energy Gamma-Ray Spectrum of 184m,184Re

“…agreed with our work in the main but which contained additional transitions which we had not observed. In particular the decay scheme presented by Glatz et al (1969) contained a 151.5 keV transition which had been reported previously by Harmatz and Handley with the energy 152.0 keV, but was not observed by us with our Ge(Li) spectrometer. Additional gamma rays with energies of 98 and 102 keV were presented in the level scheme by Glatz et al but while one of these, at 98.3 keV, was reported by Harmatz and Handley, the other has not been observed by other workers.…”