Uncertainties in extracting S-17 from transfer reactions

Citation
Jc. Fernandes et al., Uncertainties in extracting S-17 from transfer reactions, PHYS REV C, 59(5), 1999, pp. 2865-2872
Citations number
37
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
05562813 → ACNP
Volume
59
Issue
5
Year of publication
1999
Pages
2865 - 2872
Database
ISI
SICI code
0556-2813(199905)59:5<2865:UIESFT>2.0.ZU;2-O
Abstract
The transfer reaction Be-7(d,n)B-8 is modeled for the recent low experiment al energies using the distorted-wave Born approximation (DWBA). Tests of th e validity of the asymptotic normalization constant method for the extracti on of the S-17 astrophysical factor are performed. We show that a periphera l assumption is no longer accurate for center-of-mass energies greater than approximately 15 MeV. In all cases we found that core deformation and/or e xcitation effects to be small as long as the optical potential for the entr ance channel is not strongly surface peaked. Multistep corrections to the D WBA were found to be small. We also emphasize that the lack of knowledge of the optical potentials for the entrance and outgoing channels induces seve re uncertainties in the extracted S-17 astrophysical factor. [S0556-2813(99 )04704-4].