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

The half-life of 129I

Eduardo García-Toraño  1 , Timotheos Altzitzoglou  2 , Pavel Auerbach  3 , Marie-Martine Bé  4 , Christophe Bobin  4 , Philippe Cassette  4 , Frédéric Chartier  5 , Rainer Dersch  6 , Marta Fernández  7 , Hélène Isnard  5 , Karsten Kossert  6 , Valérie Lourenço  4 , Ole Nähle  6 , Anthony Nonell  8 , Virginia Peyrés  9 , Stefaan Pommé  2 , Andrej Rozkov  2 , Anabel Sánchez-Cabezudo  9 , Jana Sochorová  3
Affiliations

The half-life of 129I

Eduardo García-Toraño et al. Appl Radiat Isot. 2018 Oct.

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.

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