Determination of X- and gamma-ray emission intensities in the decay of I-131

摘要

The activity per unit mass of an iodine-131 solution was absolutely standardized by both the 4 pi beta-gamma coincidence method and the 4 pi gamma counting technique. The calibrated solution was used to prepare point sources after a preliminary deposit of AgNO3 to prevent the loss of volatile iodine. Relative and absolute photon emission intensities of 15 sgamma-rays and those of the two K X-rays of xenon were determined by gamma-ray spectrometry, with relative uncertainties of 0.8% for the three main emissions. (C) 2015 Elsevier Ltd. All rights reserved.