Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites

The preserved record of decay of now-extinct (129)I into (129)Xe forms the basis of the I-Xe chronometer. Comparison of the high precision I-Xe and Pb-Pb ages of chondrules and pure mineral phases separated from eight meteorites suggests the 17.5 ÷ 14.6 Ma range for the (129)I half-life, assuming th...

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Detalles Bibliográficos
Autores principales: PRAVDIVTSEVA, Olga, MESHIK, Alex, HOHENBERG, Charles M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690538/
https://www.ncbi.nlm.nih.gov/pubmed/29152616
http://dx.doi.org/10.7566/JPSCP.14.011005
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author PRAVDIVTSEVA, Olga
MESHIK, Alex
HOHENBERG, Charles M.
author_facet PRAVDIVTSEVA, Olga
MESHIK, Alex
HOHENBERG, Charles M.
author_sort PRAVDIVTSEVA, Olga
collection PubMed
description The preserved record of decay of now-extinct (129)I into (129)Xe forms the basis of the I-Xe chronometer. Comparison of the high precision I-Xe and Pb-Pb ages of chondrules and pure mineral phases separated from eight meteorites suggests the 17.5 ÷ 14.6 Ma range for the (129)I half-life, assuming that the (235)U and (238)U half-lives are correct. The mean value of 16 Ma indicates that the 15.7 Ma half-life of (129)I used here for the I-Xe age calculations is most probably correct. Since the (129)I half-life value only affects the relative I-Xe ages, the few Ma relative to the Shallowater standard, the absolute I-Xe ages are almost immune to this uncertainty in the (129)I half-life.
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spelling pubmed-56905382017-11-16 Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites PRAVDIVTSEVA, Olga MESHIK, Alex HOHENBERG, Charles M. JPS Conf Proc Article The preserved record of decay of now-extinct (129)I into (129)Xe forms the basis of the I-Xe chronometer. Comparison of the high precision I-Xe and Pb-Pb ages of chondrules and pure mineral phases separated from eight meteorites suggests the 17.5 ÷ 14.6 Ma range for the (129)I half-life, assuming that the (235)U and (238)U half-lives are correct. The mean value of 16 Ma indicates that the 15.7 Ma half-life of (129)I used here for the I-Xe age calculations is most probably correct. Since the (129)I half-life value only affects the relative I-Xe ages, the few Ma relative to the Shallowater standard, the absolute I-Xe ages are almost immune to this uncertainty in the (129)I half-life. 2016-08-10 2017 /pmc/articles/PMC5690538/ /pubmed/29152616 http://dx.doi.org/10.7566/JPSCP.14.011005 Text en http://creativecommons.org/licenses/by/4.0/ This article is available under the terms of the Creative Commons Attribution 4.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the article, journal citation, and DOI.
spellingShingle Article
PRAVDIVTSEVA, Olga
MESHIK, Alex
HOHENBERG, Charles M.
Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites
title Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites
title_full Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites
title_fullStr Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites
title_full_unstemmed Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites
title_short Evaluation of the (129)I Half-Life Value Through Analyses of Primitive Meteorites
title_sort evaluation of the (129)i half-life value through analyses of primitive meteorites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690538/
https://www.ncbi.nlm.nih.gov/pubmed/29152616
http://dx.doi.org/10.7566/JPSCP.14.011005
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