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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Nukleare Astrophysik
HK 40.4: Talk
Thursday, March 20, 2014, 15:15–15:30, HZ 5
13,14B(n,γ) via Coulomb Dissociation to Constrain the Astrophysical r Process — •Sebastian Altstadt for the R3B collaboration — Goethe-Universität Frankfurt — GSI Helmholtzzentrum für Schwerionenforschung GmbH
13,14B(n,γ) was experimentally studied via Coulomb dissociation at the LAND/R3B setup in order to understand the impact of (n,γ) reactions on neutron-rich boron isotopes on the r process. A primary beam of 40Ar was fragmented and the isotopes in question were separated from the primary beam using a fragment separator. A secondary beam of 14,15B was then directed onto a Pb-target to investigate the neutron breakup within the equivalent photon field. The results from the Coulomb dissociation measurement and first experimental constraints on the radiative capture cross sections will be presented. Furthermore, new evidence for a 1n halo-structure in 14B will be discussed.
This project was supported by the Helmholtz Graduate School for FAIR, the Helmholtz International Center for FAIR and the Helmholtz Young Investigator Group VH-NG-327.