Asymptotic normalization coefficients and the Be-7(p, gamma)B-8 astrophysical S factor
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Date
2001
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
We consider the results of two proton transfer reactions, B-10(Be-7, B-8)Be-9 and N-14(Be-7, B-8)C-13, to obtain a weighted average of the measured asymptotic normalization coefficients for the virtual transition 7Be +pB-8. These coefficients specify the amplitude of the tail of the B-8 overlap function in the Be-7+p channel, and are used to calculate the astrophysical S factor for the direct capture reaction Be-7(p, gamma)B-8 at solar energies, S-17(0) In light of recent improvements in the determination of optical-model potentials, including detailed understanding of the correlations between the DWBA analyses of the two experiments, and a new experimental measurement of the asymptotic normalization coefficients for the virtual transition C-13+pN-14, we report a weighted average asymptotic normalization coefficient of C-p3/2(2)= 0.388+/-0.039 fm(-1) for B-8Be-7+p, which implies S-17(0)= 17.3+/-1.8 eV b.
Description
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Keywords
COUPLED-CHANNELS CALCULATIONS, CROSS-SECTION, BE-7(P,GAMMA)B-8 REACTION, COULOMB DISSOCIATION, LOW ENERGIES, BE-7(D,N)B-8 REACTION, ANGULAR-DISTRIBUTION, S-17(0) FACTOR, MODEL, B-8, Physics
Citation
A. Azhari, V. Burjan, F. Carstoiu, Carl A. Gagliardi, V. Kroha, A. M. Mukhamedzhanov, F. M. Nunes, X. Tang, L. Trache and Robert E. Tribble. Phys.Rev.C 63 055803 2001. "Copyright (2001) by the American Physical Society."