Low-energy F18(p, α)O15 cross section measurements relevant to nova γ-ray emission

Details Low-energy F18(p, α)O15 cross section measurements relevant to nova γ-ray emission Low-energy F18(p, α)O15 cross section measurements relevant to nova γ-ray emission

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phrvc..79a5801d&link_type=abstract

Physical Review C, vol. 79, Issue 1, id. 015801

Physics

13

Scientific paper

During nova outbursts the decay of F18 is the main source of γ-ray emission at and below 511 keV. In spite of much experimental effort, the quantity of F18 synthesized still suffers from large uncertainties which arise mainly from the F18(p, α)O15 reaction cross section at low energies. We report here on a new direct measurement carried out at the Louvain-la-Neuve RIB facility of Louvain-la-Neuve using an isobarically pure F18 beam impinging on a thin polyethylene target. Cross sections down to a center-of-mass energy of 400 keV have been obtained and the results together with previous experimental data were compared to R-matrix calculations. The effect of the relative contribution of the two low-lying 3/2+ resonances as well as the sensitivity of the calculations to the R-matrix radius is studied in detail.

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