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129-I and 247-Cm in meteorites constrain the last astrophysical source of solar r-process elements
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4617120
Author(s) Côté, Benoit; Eichler, Marius; López, Andrés Yagüe; Vassh, Nicole; Mumpower, Matthew R.; Világos, Blanka; Soős, Benjámin; Arcones, Almudena; Sprouse, Trevor M.; Surman, Rebecca; Pignatari, Marco; Pető, Mária K.; Wehmeyer, Benjamin; Rauscher, Thomas; Lugaro, Maria
Author(s) at UniBasel Rauscher, Thomas
Year 2021
Title 129-I and 247-Cm in meteorites constrain the last astrophysical source of solar r-process elements
Journal Science
Volume 371
Number 6532
Pages / Article-Number 945-948
Abstract The composition of the early Solar System can be inferred from meteorites. Many elements heavier than iron were formed by the rapid neutron capture process (r-process), but the astrophysical sources where this occurred remain poorly understood. We demonstrate that the near-identical half-lives ( ≃ 15.6 million years ) of the radioactive r-process nuclei iodine-129 and curium-247 preserve their ratio, irrespective of the time between production and incorporation into the Solar System. We constrain the last r-process source by comparing the measured meteoritic ratio 129 I/ 247 Cm = 438 ± 184 with nucleosynthesis calculations based on neutron star merger and magneto-rotational supernova simulations. Moderately neutron-rich conditions, often found in merger disk ejecta simulations, are most consistent with the meteoritic value. Uncertain nuclear physics data limit our confidence in this conclusion.
Publisher American Association for the Advancement of Science
ISSN/ISBN 0036-8075 ; 1095-9203
edoc-URL https://edoc.unibas.ch/82186/
Full Text on edoc No
Digital Object Identifier DOI 10.1126/science.aba1111
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/33632846
ISI-Number 000621813400043
 
   

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