Behavior of the 7Be(p,γ)8B astrophysical S factor near zero energy

Details Behavior of the 7Be(p,γ)8B astrophysical S factor near zero energy Behavior of the 7Be(p,γ)8B astrophysical S factor near zero energy

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvc..62f5803b&link_type=abstract

Physical Review C (Nuclear Physics), Volume 62, Issue 6, December 2000, id.065803

Physics

Nuclear Physics

14

Radiative Capture, Optical And Diffraction Models, Direct Reactions, 6<=A<=19

Scientific paper

The astrophysical S factor of the 7Be(p,γ)8B radiative capture reaction is analyzed at zero energy in a simplified potential model where the scattering wave function and its energy derivative at zero energy are replaced by their asymptotic expressions. A positive (negative) scattering length in the initial s wave reduces (increases) the value of S(0). The ratio S'(0)/S(0) is much more sensitive to the scattering length than S(0). The effective range of the initial wave is found to play a negligible role. Existing models suggest a negative value for the scattering length, but not large enough to lead to important corrections.

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