The half-life of 129I. (October 2018)

• Record Type: Journal Article
• Authors: García-Toraño, Eduardo; Altzitzoglou, Timotheos; Auerbach, Pavel; Bé, Marie-Martine; Bobin, Christophe; Cassette, Philippe; Chartier, Frédéric; Dersch, Rainer; Fernández, Marta; Isnard, Hélène; Kossert, Karsten; Lourenço, Valérie; Nähle, Ole; Nonell, Anthony; Peyrés, Virginia; Pommé, Stefaan; Rozkov, Andrej; Sánchez-Cabezudo, Anabel; Sochorová, Jana
• Is Part Of: Applied radiation and isotopes. Volume 140(2018:Oct.)
• Page Start: 157
• Page End: 162
• Publication Date: 2018-10
• Subjects: 129I -- Half-life -- Standardization -- Mass spectrometry -- Activity measurements; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2018.06.007
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: The radionuclide 129 I is a long-lived fission product that decays to 129 Xe 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 129 I is 16.14 (12) × 10 6 a, in good agreement with recommended data but with a significant improvement in the uncertainty. Highlights: The half-life of the long-lived radionuclide 129 I has been measured. Results obtained by a combination of activity and mass concentration measurements. Results agree with recommended data with a significant improvement in the uncertainty.