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Tuning the Re/Os Clock: Stellar-Neutron Cross Sections

Mengoni, A. ; Mosconi, M. ; Fujii, K. ; Käppeler, F.

In: Publications of the Astronomical Society of Australia, 2009, vol. 26, no. 3, p. 250-254

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    Titre
    • Tuning the Re/Os Clock: Stellar-Neutron Cross Sections
    Auteur
    • Mengoni, A.. International Atomic Energy Agency, Vienna, Austria and CERN, Geneva, Switzerland
    • Mosconi, M.. Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
    • Fujii, K.. INFN, Sezione di Trieste and Universitá degli Studi di Padova, Italy
    • Käppeler, F.. Forschungszentrum Karlsruhe, Germany
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Publications of the Astronomical Society of Australia, 2009, vol. 26, no. 3, p. 250-254. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:304376
    Summary
    The neutron-capture cross sections of 186,187Os have been recently measured at the CERN neutron time-of-flight facility n_TOF for an improved evaluation of the Re/Os cosmo-chronometer. This experimental information was complemented by nuclear model calculations for obtaining the proper astrophysical reaction rates at s-process temperatures. The calculated results and their implications for the determination of the time-duration of nucleosynthesis during galactic chemical evolution is discussed