Asymptotic normalization coefficients for B-8 -> Be-7+p from a study of Li-8 -> Li-7+n
Date
2003
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Asymptotic normalization coefficients (ANCs) for Li-8-->Li-7+n have been extracted from the neutron transfer reaction C-13(Li-7,Li-8)C-12 at 63 MeV. These are related to the ANCs in B-8-->Be-7 + p using charge symmetry. We extract ANCs for B-8 which are in very good agreement with those inferred from proton transfer and breakup experiments. We have also separated the contributions from the p(1/2) and p(3/2) components in the transfer. We find the astrophysical factor for the Be-7(p, gamma)B-8 reaction to be S-17( 0) = 17.6+/-1.7 eV b. This is the first time that the rate of a direct capture reaction of astrophysical interest has been determined through a measurement of the ANCs in the mirror system.
Description
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Keywords
COUPLED-CHANNELS CALCULATIONS, CROSS-SECTION, VERTEX CONSTANTS, CLUSTER-MODEL, SHELL-MODEL, NUCLEI, B-8, BE-7(P, ENERGY, MEV/NUCLEON, Physics
Citation
L. Trache, A. Azhari, F. Carstoiu, H. L. Clark, Carl A. Gagliardi, Y. W. Lui, A. M. Mukhamedzhanov, X. Tang, N. Timofeyuk and Robert E. Tribble. Phys.Rev.C 67 062801 2003. "Copyright (2003) by the American Physical Society."