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

Marie-Christine Lépy; Laurine Brondeau; Christophe Bobin; Valérie Lourenço; Cheick Thiam; Marie-Martine Bé

doi:10.1016/j.apradiso.2015.11.091

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

Appl Radiat Isot. 2016 Mar:109:154-159. doi: 10.1016/j.apradiso.2015.11.091. Epub 2015 Nov 27.

Authors

Marie-Christine Lépy¹, Laurine Brondeau², Christophe Bobin², Valérie Lourenço², Cheick Thiam², Marie-Martine Bé²

Affiliations

¹ CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât 602, PC111, 91191 Gif-sur-Yvette Cedex, France. Electronic address: marie-christine.lepy@cea.fr.
² CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât 602, PC111, 91191 Gif-sur-Yvette Cedex, France.

PMID: 26651173
DOI: 10.1016/j.apradiso.2015.11.091

Abstract

The activity per unit mass of an iodine-131 solution was absolutely standardized by both the 4πβ-γ coincidence method and the 4πγ 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.

Keywords: (131)I; 4πβ–γ coincidence; 4πγ counting; Gamma-ray spectrometry; Photon emission intensities.