Direct Capture S-factors from Asymptotic Normalization Coefficients

Details Direct Capture S-factors from Asymptotic Normalization Coefficients Direct Capture S-factors from Asymptotic Normalization Coefficients

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003omeg.conf..107t&link_type=abstract

ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2000. Proceedings of the International Symposium. Held 19-21 January 2000 in Universi

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Peripheral transfer reactions can be used to determine asymptotic normalization coefficients (ANC). These coefficients, which provide the normalization of the tail of the overlap function, determine S-factors for direct capture reactions at astro-physical energies. A variety of proton transfer reactions have been used to measure ANC's. As a test of the technique, the 16O(3He,d)17F reaction has been used to determine ANC's for transitions to the ground and first excited states of 17F. The S-factors for 16O(p,γ)17F calculated from these 17F → 16O + p ANC's are found to be in very good agreement with recent measurements. Following the same technique, the 10B(7Be,8B)9Be and 14N(7Be,8B)13C reactions have been used, along with optical model parameters for the radioactive beams that were obtained from a study of elastic scattering of loosely bound p-shell nuclei, to measure the ANC appropriate for determining 7Be(p,γ)8B. The results from the two transfer reactions provide an indirect determination of S17(0).

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