# The half-life of 129I

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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.
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Journal articles
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Complete list of metadatas

Cited literature [31 references]

https://hal-cea.archives-ouvertes.fr/cea-02339672
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Submitted on : Monday, November 4, 2019 - 2:14:34 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:14 AM

### Citation

Eduardo García-Toraño, T. Altzitzoglou, P. Auerbach, M.-M. Bé, C. Bobin, et al.. The half-life of 129I. Applied Radiation and Isotopes, Elsevier, 2018, 140, pp.157-162. ⟨10.1016/j.apradiso.2018.06.007⟩. ⟨cea-02339672⟩

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