Direct capture astrophysical S factors at low energy

Details Direct capture astrophysical S factors at low energy Direct capture astrophysical S factors at low energy

1998-02-10

arxiv.org/abs/nucl-th/9802028v4

Phys.Rev.C58:579-581,1998

Physics

Nuclear Physics

Nuclear Theory

8 pages including 2 figures

Scientific paper

10.1103/PhysRevC.58.579

We investigate the energy dependence of the astrophysical S factors for the reactions 7Be(p,gamma)8B, the primary source of high-energy solar neutrinos in the solar pp chain, and 16O(p,gamma)17F, an important reaction in the CNO cycle. Both of these reactions have predicted S factors which rise at low energies; we find the source of this behavior to be a pole in the S factor at a center-of-mass energy E = -E_B, the point where the energy of the emitted photon vanishes. The pole arises from a divergence of the radial integrals.

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