Metrological Measurement of 99mTc Half-life Radionuclide by Germanium Detector

Abstract

An approach for half-life determination using gamma spectrometry with Ge detector is presented. This measurement reduces the contribution of the type B component on the total uncertainty. The independence of the method with respect to the instrumental interferences or radiochemical impurities was evidenced. The method shows no limitations for the measurements of samples containing a genetically related impurity of concentrations below than 3% with the same energy or very close to the one of the radionuclide to be measured, e.g.,99Mo in a99mTc sample. The results of half-lives are in good agreement with the literature and the associated uncertainties lower than 0.1 %.