Skip to Main content Skip to Navigation
Journal articles

The $^{18}F(p,$\alpha$) $^{15}O$ low-energy S--factor: A microscopic approach

Abstract : The $^{18}F(p,$\alpha$) $^{15}$O S--factor is determined in a microscopic cluster model. The wave functions are defined in the Generator Coordinate Method, involving various $^{18}$F + p, $^{15}O+$\alpha$, and $^{18}$Ne + n configurations. We analyze the $^{19}$Ne level scheme, and test the model with the $^{19}$F 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 $^{18}$F(p,$\alpha$) $^{15}$O 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 $^{19}$F, but have not been searched for in $^{19}Ne. An elastic--scattering experiment above 1 MeV is suggested.
Document type :
Journal articles
Complete list of metadatas

Cited literature [14 references]  Display  Hide  Download

http://hal.in2p3.fr/in2p3-00142364
Contributor : Béatrice Forrler <>
Submitted on : Friday, April 20, 2007 - 9:46:47 AM
Last modification on : Thursday, June 4, 2020 - 10:24:03 AM
Long-term archiving on: : Saturday, May 14, 2011 - 4:00:38 AM

Files

f18pa_mod.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

M. Dufour, P. Descouvemont. The $^{18}F(p,$\alpha$) $^{15}O$ low-energy S--factor: A microscopic approach. Nuclear Physics A, Elsevier, 2007, 785, pp.381-394. ⟨10.1016/j.nuclphysa.2006.12.101⟩. ⟨in2p3-00142364⟩

Share

Metrics

Record views

325

Files downloads

687