Phys. Rev. Lett. 73, 2027–2030 (1994)Overall Normalization of the Astrophysical S Factor and the Nuclear Vertex Constant for 7Be(p,γ)8B ReactionsReceived 10 June 1994; published in the issue dated 10 October 1994 We point out a simple relation between the nuclear vertex constant (NVC) and the overall normalization of the astrophysical S factor. Using predicted values of the NVC for the virtual decay of 8B→7Be+p we find S17(0)≈17.6 eVb for 7Be(p,γ)8B reactions, consistent with the low values extrapolated from direct capture measurements by Filippone et al. and by Vaughn et al. New possibilities, using proton transfer reactions, to measure the astrophysical S factor indirectly are proposed. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.73.2027
DOI:
10.1103/PhysRevLett.73.2027
PACS:
25.40.Lw, 25.60.+v, 95.30.Cq
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