Nuclear Physics in Astrophysics II
Re-evaluation of the low-energy Coulomb-dissociation cross section of 8B and the astrophysical S17 factor
GSI, Darmstadt, Germany
Accepted: 20 December 2005
Published online: 10 March 2006
An exclusive measurement of the Coulomb breakup of 8B into 7Be+p at 254 AMeV was used to infer the low-energy 7Be(p,γ)8B cross section. Particular emphasis was placed on the angular correlations of the breakup particles which demonstrate clearly that E1 multipolarity dominates within the angular cuts selected for the analysis. The deduced astrophysical S17 factors exhibit good agreement with the most recent direct 7Be(p,γ)8B measurements.
PACS: 25.40.Lw Radiative capture – / 25.60.-t Reactions induced by unstable nuclei – / 25.70.De Coulomb excitation – / 26.65.+t Solar neutrinos –
© Società Italiana di Fisica and Springer-Verlag, 2006