Chiera, Nadine M.Sprung, PeterAmelin, YuriDressler, RugardSchumann, DorotheaTalip, Zeynep2025-05-232025-05-232045-2322PubMed:39090187http://www.scopus.com/inward/record.url?scp=85200260796&partnerID=8YFLogxKhttps://hdl.handle.net/1885/733752603The half-life of the extinct radiolanthanide 146Sm, important for both geochronological and astrophysical applications, was re-determined by a combination of mass spectrometry and α-decay counting. Earlier studies provided only limited information on all potential factors that could influence the quantification of the half-life of 146Sm. 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 146Sm was derived to be 92.0 Ma ± 2.6 Ma, with an uncertainty coverage factor of k=1.This project is funded by the Swiss National Science Foundation (SNF Grant No. 200021-159738).enPublisher Copyright: © The Author(s) 2024.146Sm half-lifeEarly solar system isotopic chronometerIsotopic datingMC-ICP-MSTIMSα-Spectrometry202410.1038/s41598-024-64104-685200260796