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The 18F(p,??)?15O low-energy S-factor:: a microscopic approach

par Dufour, Marianne;Descouvemont, Pierre
Référence Nuclear Physics A, 785, 3-4, page (381-394)
Publication Publié, 2007

Article révisé par les pairs

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Résumé :

The 18F(p, α) 15O S-factor is determined in a microscopic cluster model. The wave functions are defined in the Generator Coordinate Method, involving various 18F + p, 15O+α, and 18Ne + n configurations. We analyze the 19Ne level scheme, and test the model with the 19F spectrum, better known experimentally. We focus on 1 / 2+ and 3 / 2+ states, corresponding to s waves, and expected to represent the main contribution in the 18F(p, α) 15O cross section at stellar energies. The 1 / 2+ partial wave is shown to play an important role in a wide energy range. This property reduces the uncertainties associated with interference patterns in the 3 / 2+ contribution. The relevant 1 / 2+ states have been observed in 19F, but have not been searched for in 19Ne. An elastic-scattering experiment above 1 MeV is suggested. © 2007 Elsevier B.V. All rights reserved.