HALF-LIVES OF THE NUCLIDES Au195, Pt195m, AND Pt197

Abstract

The half-lives of Au195, Pt195m, and Pt197 have been measured. The radionuclides were produced by neutron irradiation in the NRX reactor at Chalk River and were radiochemically purified after the irradiation. The decay of the X rays and γ-radiations from Au195 and Pt195m was observed with a NaI (Tl) detector, and the β-decay of Pt197 was observed with an anthracene detector. The half-lives are:[Formula: see text]The errors quoted are the estimated reliability of the measurement and include the statistical counting error plus an estimated systematic error.