Asymptotic normalization coefficients and the Be-7(p, gamma)B-8 astrophysical S factor Academic Article uri icon

abstract

  • We consider the results of two proton transfer reactions, 10B(7Be,8B)9Be and 14N(7Be,8B)13C, to obtain a weighted average of the measured asymptotic normalization coefficients for the virtual transition 7Be +p8B. These coefficients specify the amplitude of the tail of the 8B overlap function in the 7Be+p channel, and are used to calculate the astrophysical S factor for the direct capture reaction 7Be(p,)8B at solar energies, S17(0). In light of recent improvements in the determination of optical-model potentials, including detailed understanding of the correlations between the DWBA analyses of the two experiments, and a new experimental measurement of the asymptotic normalization coefficients for the virtual transition 13C+p14N, we report a weighted average asymptotic normalization coefficient of C2p3/2=0.3880.039 fm-1 for 8B 7Be+p, which implies S17(0)=17.31.8 eVb.

published proceedings

  • PHYSICAL REVIEW C

author list (cited authors)

  • Azhari, A., Burjan, V., Carstoiu, F., Gagliardi, C. A., Kroha, V., Mukhamedzhanov, A. M., ... Tribble, R. E.

citation count

  • 71

complete list of authors

  • Azhari, A||Burjan, V||Carstoiu, F||Gagliardi, CA||Kroha, V||Mukhamedzhanov, AM||Nunes, FM||Tang, X||Trache, L||Tribble, RE

publication date

  • April 2001