Asymptotic normalization coefficients and the 7Be(p,γ)8B astrophysical S factor

Details Asymptotic normalization coefficients and the 7Be(p,γ)8B astrophysical S factor Asymptotic normalization coefficients and the 7Be(p,γ)8B astrophysical S factor

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phrvc..63e5803a&link_type=abstract

Physical Review C, vol. 63, Issue 5, id. 055803

Astronomy and Astrophysics

Astrophysics

47

Transfer Reactions, Solar Neutrinos, Hydrostatic Stellar Nucleosynthesis, Elastic Scattering

Scientific paper

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+p<-->8B. 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,γ)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+p<-->14N,y we report a weighted average asymptotic normalization coefficient of C2p3/2=0.388+/-0.039 fm- 1 for 8B <-->7Be+p, which implies S17(0)=17.3+/-1.8 eV b.

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