Disintegration rate measurement of a 192Ir solution

The disintegration rate of 192Ir has been measured using the 4πβ–γ coincidence technique. This radionuclide decays by electron capture (EC) and β-emission. Since the EC contribution is low (4.5%), it has been corrected using decay scheme data taken from the literature. This measurement has been performed in collaboration with the Laboratório Nacional de Metrologia das Radiações Ionizantes (IRDDM), in Rio de Janeiro. The results, which were obtained independently and employed different techniques, are compared with the Systéme International Reference (SIR) maintained at the Bureau International des Poids et Mesures.