Resonating-group calculation of radiative capture reactions alpha(He-3, gamma)Be-7 and alpha(t, gamma)Li-7 at astrophysical low energies

Details Resonating-group calculation of radiative capture reactions alpha(He-3, gamma)Be-7 and alpha(t, gamma)Li-7 at astrophysical low energies Resonating-group calculation of radiative capture reactions alpha(He-3, gamma)Be-7 and alpha(t, gamma)Li-7 at astrophysical low energies

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phrvl..52..739k&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 52, Feb. 27, 1984, p. 739-742. Research supported by the Osaka University.

Astronomy and Astrophysics

Astrophysics

51

Beryllium 7, Lithium Isotopes, Nuclear Capture, Radiation Trapping, Solar Neutrinos, Weak Energy Interactions, Absorption Cross Sections, Coulomb Collisions, Multipoles, Nuclear Binding Energy, Resonance Scattering

Scientific paper

Resonating-group analysis is used to determine the total cross sections and astrophysical reaction rates (S factors) of two radiative-capture reactions of importance in solar-evolution models. All available multipole contributions and the Pauli principle are accounted for, and the results are presented in graphs and a table. S factors for incident energies (Ecm) as low as 10 keV are determined without normalization, artificial parameters, or extrapolation for the reactions alpha(He-3, gamma)Be-7 and alpha(t, gamma)Li-7. At Ecm = 10 keV, the S factor for the Be-7 reaction is 0.508 keV barn. The S factors for the Li-7 reaction are found to be about five times smaller than those of Be-7; this difference is attributed to different threshold energies and Coulomb penetration factors. The solar-model implications are discussed in detail.

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