The half-life of 129I

Eduardo García-Toraño; Timotheos Altzitzoglou; Pavel Auerbach; Marie-Martine Bé; Christophe Bobin; Philippe Cassette; Frédéric Chartier; Rainer Dersch; Marta Fernández; Hélène Isnard; Karsten Kossert; Valérie Lourenço; Ole Nähle; Anthony Nonell; Virginia Peyrés; Stefaan Pommé; Andrej Rozkov; Anabel Sánchez-Cabezudo; Jana Sochorová

doi:10.1016/j.apradiso.2018.06.007

The half-life of ¹²⁹I

Appl Radiat Isot. 2018 Oct:140:157-162. doi: 10.1016/j.apradiso.2018.06.007. Epub 2018 Jun 15.

Authors

Eduardo García-Toraño¹, Timotheos Altzitzoglou², Pavel Auerbach³, Marie-Martine Bé⁴, Christophe Bobin⁴, Philippe Cassette⁴, Frédéric Chartier⁵, Rainer Dersch⁶, Marta Fernández⁷, Hélène Isnard⁵, Karsten Kossert⁶, Valérie Lourenço⁴, Ole Nähle⁶, Anthony Nonell⁸, Virginia Peyrés⁹, Stefaan Pommé², Andrej Rozkov², Anabel Sánchez-Cabezudo⁹, Jana Sochorová³

Affiliations

¹ Laboratorio de Metrología de Radiaciones Ionizantes (CIEMAT), Avda. Complutense 40, 28040 Madrid, Spain. Electronic address: e.garciatorano@ciemat.es.
² European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Retieseweg 111, B-2440 Geel, Belgium.
³ Czech Metrological Institute (CMI), Radiova 1, CZ 10200 Praha 10, Czech Republic.
⁴ CEA-LIST, Laboratoire National Henri Becquerel (LNE-LNHB) CE-Saclay, 91191 Gif sur Yvette Cedex, France.
⁵ Den - Département de Physico-Chimie, CEA, Université Paris-Saclay, F-91191 Gif sur Yvette Cedex, France.
⁶ Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany.
⁷ Unidad de Espectroscopía de Masas y Apl. Geoquimicas (CIEMAT), Avda. Complutense 40, 28040 Madrid, Spain.
⁸ Den - Service d'Etudes Analytiques et de Réactivité des Surfaces (SEARS), CEA, Université Paris-Saclay, F-91191 Gif sur Yvette Cedex, France.
⁹ Laboratorio de Metrología de Radiaciones Ionizantes (CIEMAT), Avda. Complutense 40, 28040 Madrid, Spain.

PMID: 30015046
DOI: 10.1016/j.apradiso.2018.06.007

Abstract

The radionuclide ¹²⁹I is a long-lived fission product that decays to ¹²⁹Xe by beta-particle emission. It is an important tracer in geological and biological processes and is considered one of the most important radionuclides to be assessed in studies of global circulation. It is also one of the major contributors to radiation dose from nuclear waste in a deep geological repository. Its half-life has been obtained by a combination of activity and mass concentration measurements in the frame of a cooperation of 6 European metrology institutes. The value obtained for the half-life of ¹²⁹I is 16.14 (12) × 10⁶ a, in good agreement with recommended data but with a significant improvement in the uncertainty.

Keywords: (129)I; Activity measurements; Half-life; Mass spectrometry; Standardization.