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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