Overall normalization of the astrophysical S factor and the nuclear vertex constant for 7Be(p,γ)8B reactions

Details Overall normalization of the astrophysical S factor and the nuclear vertex constant for 7Be(p,γ)8B reactions Overall normalization of the astrophysical S factor and the nuclear vertex constant for 7Be(p,γ)8B reactions

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvl..73.2027x&link_type=abstract

Physical Review Letters, Volume 73, Issue 15, October 10, 1994, pp.2027-2030

Astronomy and Astrophysics

Astrophysics

129

Radiative Capture, Elementary Particle Processes

Scientific paper

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 eV b 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.

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