A test of the zero-range DWBA method at astrophysical energies
Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles, CP 229, B-1050, Brussels, Belgium
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Accepted: 30 November 2004
Published online: 12 January 2005
The DWBA method is tested through a comparison with a microscopic cluster model on the 13C (α, n) 16O reaction in the energy range E = 0-5MeV, relevant for nuclear astrophysics. The conditions of the calculation are as close as possible to the reference model, i.e. the nucleus-nucleus potentials are phase equivalent, and the spectroscopic factors are identical. We find significant differences between both approaches, which means that antisymmetrization effects, missing in the DWBA, are important. Our work also points out the strong sensitivity of the DWBA with input parameters.
PACS: 24.10.-i Nuclear reaction models and methods – / 24.10.Eq Coupled-channel and distorted-wave models –
© Società Italiana di Fisica and Springer-Verlag, 2005