OVERALL NORMALIZATION OF THE ASTROPHYSICAL S-FACTOR AND THE NUCLEAR VERTEX CONSTANT FOR BE-7(P,GAMMA)B-8 REACTIONS

Authors
XU HM GAGLIARDI CA TRIBBLE RE MUKHAMEDZHANOV AM TIMOFEYUK NK
Citation
Hm. Xu et al., OVERALL NORMALIZATION OF THE ASTROPHYSICAL S-FACTOR AND THE NUCLEAR VERTEX CONSTANT FOR BE-7(P,GAMMA)B-8 REACTIONS, Physical review letters, 73(15), 1994, pp. 2027-2030
Citations number
32
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
73
Issue
15
Year of publication
1994
Pages
2027 - 2030
Database
ISI
SICI code
0031-9007(1994)73:15<2027:ONOTAS>2.0.ZU;2-O
Abstract
We point out a simple relation between the nuclear vertex constant (NV C) and the overall normalization of the astrophysical S factor. Using predicted values of the NVC for the virtual decay of B-8 --> Be-7 + p, we find S-17(0) approximate to 17.6 eVb for Be-7(p, gamma)B-8 reactio ns, consistent with the low values extrapolated from direct capture me asurements by Filippone et al. and by Vaughn et al. New possibilities, using proton transfer reactions, to measure the astrophysical S facto r indirectly are proposed.