Uncertainties in extracting $S_{17}$ from transfers

Abstract

The transfer reaction ${}^7{\mathrm{Be}(\mathrm{d},\mathrm{n})}^8\mathrm{B}$ is modelled for the recent low experimental energies using the DWBA. Tests of the validity of the ANC method for the extraction of the $S_{17}$ astrophysical factor are performed. We show that a peripheral 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 excitation effects to be small as long as the optical potential for the entrance channel is not strongly surface peaked. Multistep corrections to the DWBA were found to be small. We also emphasize that the lack of knowledge of the optical potentials for the entrance and outgoing channels induces severe uncertainties in the extracted $S_{17}$ astrophysical factor.

17 pages, 8 figures, to be published in Phys Rev C

References in corpus (4)

• Solar Fusion Cross Sections
• New measurement and analysis of the 7Be(p,gamma)8B cross section
• Direct capture astrophysical S factors at low energy
• Effects of B-8 size on the low-energy Be7(p,gamma)B8 cross section

Cited by in corpus (7)

• Optical model potentials involving loosely bound p-shell nuclei around 10 MeV/A
• Reaction models to probe the structure of light exotic nuclei
• Determination of S17 from 7Be(d,n)8B reaction: CDCC analyses based on three-body model
• (^{8})B breakup in elastic and transfer reactions
• How unique is the Asymptotic Normalisation Coefficient (ANC) method?
• Astrophysical S_{17}(0) factor from a measurement of d(7Be,8B)n reaction at E_{c.m.} = 4.5 MeV
• Role of virtual break-up of projectile in astrophysical fusion reactions