Radiative capture of nucleons at astrophysical energies with single-particle states

Details Radiative capture of nucleons at astrophysical energies with single-particle states Radiative capture of nucleons at astrophysical energies with single-particle states

2008-10-21

arxiv.org/abs/0810.3867v3

Physics

Nuclear Physics

Nuclear Theory

Accepted for publication in Atomic Data & Nuclear Data Tables

Scientific paper

Radiative capture of nucleons at energies of astrophysical interest is one of the most important processes for nucleosynthesis. The nucleon capture can occur either by a compound nucleus reaction or by a direct process. The compound reaction cross sections are usually very small, specially for light nuclei. The direct capture proceeds either via the formation of a single-particle resonance, or a non-resonant capture process. In this work we calculate radiative capture cross sections and astrophysical S-factors for nuclei in the mass region A<20 using single-particle states. We carefully discuss the parameter fitting procedure adopted in the simplified two-body treatment of the capture process. Then we produce a detailed list of cases for which the model works well. Useful quantities, such as spectroscopic factors and asymptotic normalization coefficients, are obtained and compared to published data.

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