High-temperature 205Tl decay clarifies 205Pb dating in early Solar System

• 成果类型: Article
• 署名作者: Leckenby, Guy; Sidhu, Ragandeep Singh; Chen, Rui Jiu; Mancino, Riccardo; Szanyi, Balazs; Bai, Mei; Battino, Umberto; Blaum, Klaus; Brandau, Carsten; Cristallo, Sergio; Dickel, Timo; Dillmann, Iris; Dmytriiev, Dmytro; Faestermann, Thomas; Forstner, Oliver; Franczak, Bernhard; Geissel, Hans; Gernhaeuser, Roman; Glorius, Jan; Griffin, Chris; Gumberidze, Alexandre; Haettner, Emma; Hillenbrand, Pierre-Michel; Karakas, Amanda; Kaur, Tejpreet; Korten, Wolfram; Kozhuharov, Christophor; Kuzminchuk, Natalia; Langanke, Karlheinz; Litvinov, Sergey; Litvinov, Yuri A.; Lugaro, Maria; Martinez-Pinedo, Gabriel; Menz, Esther; Meyer, Bradley; Morgenroth, Tino; Neff, Thomas; Nociforo, Chiara; Petridis, Nikolaos; Pignatari, Marco; Popp, Ulrich; Purushothaman, Sivaji; Reifarth, Rene; Sanjari, Shahab; Scheidenberger, Christoph; Spillmann, Uwe; Steck, Markus; Stoehlker, Thomas; Tanaka, Yoshiki K.; Trassinelli, Martino; Trotsenko, Sergiy; Varga, Laszlo; Vescovi, Diego; Wang, Meng; Weick, Helmut; Yaguee Lopez, Andres; Yamaguchi, Takayuki; Zhang, Yuhu; Zhao, Jianwei
• 署名单位: University of British Columbia; University of British Columbia; Helmholtz Association; GSI Helmholtz-Center for Heavy Ion Research; University of Edinburgh; Max Planck Society; Chinese Academy of Sciences; Institute of Modern Physics, CAS; Technical University of Darmstadt; Szeged University; HUN-REN; HUN-REN Research Centre for Astronomy & Earth Sciences; Konkoly Thege Miklos Astronomical Institute; University of Hull; Istituto Nazionale Astrofisica (INAF); Justus Liebig University Giessen; Istituto Nazionale Astrofisica (INAF); Istituto Nazionale di Fisica Nucleare (INFN); Justus Liebig University Giessen; University of Victoria; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); Technical University of Munich; Friedrich Schiller University of Jena; Monash University; University of Tokyo; Panjab University; CEA; Universite Paris Saclay; Helmholtz Association; GSI Helmholtz-Center for Heavy Ion Research; Eotvos Lorand University; Clemson University; Goethe University Frankfurt; United States Department of Energy (DOE); Los Alamos National Laboratory; Helmholtz Association; GSI Helmholtz-Center for Heavy Ion Research; RIKEN; Centre National de la Recherche Scientifique (CNRS); Sorbonne Universite; Saitama University; Charles University Prague
• 刊物名称: Nature
• ISSN/ISSBN: 0028-5974
• DOI: 10.1038/s41586-024-08130-4
• 发表日期: 2024-11-14
• 关键词: asymptotic giant branch; orbital electron-capture; intermediate-mass stars; ionized heavy-atoms; state beta-decay; s-process; ion storage; half-life; agb; nucleosynthesis

摘要

Radioactive nuclei with lifetimes on the order of millions of years can reveal the formation history of the Sun and active nucleosynthesis occurring at the time and place of its birth1,2. Among such nuclei whose decay signatures are found in the oldest meteorites, 205Pb is a powerful example, as it is produced exclusively by slow neutron captures (the s process), with most being synthesized in asymptotic giant branch (AGB) stars3-5. However, making accurate abundance predictions for 205Pb has so far been impossible because the weak decay rates of 205Pb and 205Tl are very uncertain at stellar temperatures6,7. To constrain these decay rates, we measured for the first time the bound-state beta- decay of fully ionized 205Tl81+, an exotic decay mode that only occurs in highly charged ions. The measured half-life is 4.7 times longer than the previous theoretical estimate8 and our 10% experimental uncertainty has eliminated the main nuclear-physics limitation. With new, experimentally backed decay rates, we used AGB stellar models to calculate 205Pb yields. Propagating those yields with basic galactic chemical evolution (GCE) and comparing with the 205Pb/204Pb ratio from meteorites9-11, we determined the isolation time of solar material inside its parent molecular cloud. We find positive isolation times that are consistent with the other s-process short-lived radioactive nuclei found in the early Solar System. Our results reaffirm the site of the Sun's birth as a long-lived, giant molecular cloud and support the use of the 205Pb-205Tl decay system as a chronometer in the early Solar System. Measurement of the bound-state beta- decay of 205Tl81+ gives a new, longer half-life, allowing for the calculation of accurate stellar 205Pb yields and the isolation time of the early Solar System.