Determination of the neutron-capture rate of C-17 for r-process nucleosynthesis

  • R3B Collaboration

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    Abstract

    With the (RB)-B-3-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of C-18 at a projectile energy around 425A MeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of C-17 into the ground state of C-18. Those data have been used to constrain theoretical calculations for transitions populating excited states in C-18. This allowed to derive the astrophysical cross section sigma(n gamma)*. accounting for the thermal population of C-17 target states in astrophysical scenarios. The experimentally verified capture rate is significantly lower than those of previously obtained Hauser-Feshbach estimations at temperatures T-9

    Original languageEnglish
    Article number014613
    Number of pages9
    JournalPhysical Review C
    Volume95
    Issue number1
    DOIs
    Publication statusPublished - 30-Jan-2017

    Keywords

    • RELATIVISTIC HEAVY-IONS
    • NUCLEAR-PHYSICS
    • METAL-POOR
    • LIGHT
    • RICH
    • COSMOCHRONOLOGY
    • DISSOCIATION
    • DETECTOR
    • ELEMENTS
    • EJECTA

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