The $$^{146}\text{Sm}$$ 146 Sm half-life re-measured: consolidating the chronometer for events in the early Solar System

Autor: Nadine M. Chiera, Peter Sprung, Yuri Amelin, Rugard Dressler, Dorothea Schumann, Zeynep Talip
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Druh dokumentu: article
ISSN: 2045-2322
DOI: 10.1038/s41598-024-64104-6
Popis: Abstract The half-life of the extinct radiolanthanide $$^{146}\text{Sm}$$ 146 Sm , important for both geochronological and astrophysical applications, was re-determined by a combination of mass spectrometry and $$\alpha$$ α -decay counting. Earlier studies provided only limited information on all potential factors that could influence the quantification of the half-life of $$^{146}\text{Sm}$$ 146 Sm . Thus, special attention was given here to a complete documentation of all experimental steps to provide information about any possible artifacts in the data analysis. The half-life of $$^{146}\text{Sm}$$ 146 Sm was derived to be 92.0 Ma ± 2.6 Ma, with an uncertainty coverage factor of $$\mathsf{\textit{k}\!=\!1}$$ k = 1 .
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