Asymptotic Normalization Coefficients and the S_17(0).

Details Asymptotic Normalization Coefficients and the S_17(0). Asymptotic Normalization Coefficients and the S_17(0).

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..aprb14001a&link_type=abstract

American Physical Society, April Meeting, April 29-May 2, 2000 Long Beach, CA, abstract #B14.001

Astronomy and Astrophysics

Astrophysics

Scientific paper

The determination of direct capture reaction rates remains a high priority within nuclear astrophysics. These rates can be obtained indirectly through the measurement of Asymptotic Normalization Coefficients (ANC)(H.M. Xu et al., Phys. Rev. Lett. 73, 2027 (1994).). In particular, the determination of the astrophysical S-factor for the radiative capture reaction ^7Be(p,γ)^8B, S_17(0), plays a key role in clarifying the solar neutrino problem. The reactions ^10B(^7Be, ^8B)^9Be and ^14N(^7Be, ^8B)^13C were studied using a ^7Be radioactive beam to obtain the ANC's for the direct capture reaction ^7Be(p,γ)^8B. Elastic scattering events were measured simultaneously and used to verify optical model potentials which were used in DWBA calculations to predict the proton transfer cross sections. Elastic and proton transfer cross sections were obtained and used to extract the ANC's. Correlations within the uncertainties were determined and will be presented along with a weighted average for the S_17(0).

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