New low-energy measurement of the 18F(p,α)15O reaction

N. de Séréville, C. Angulo, P. Leleux, A. Coc, J. Kiener, A. Lefebvre, V. Tatischeff, N.L. Achouri, N. Orr, E. Casarejos, T. Davinson, D. Robertson, P. Descouvemont, P. Figuera, S. Fox, A.M. Laird, P. Mumby-Croft, K. Vaughan, F. Hammache

Research output: Contribution to journalArticlepeer-review

Abstract

The F, produced during nova explosions, is the main responsible for the 511 keV γ-ray emitted during the outburst that could be detected with satellite missions or future γ-ray telescopes. In spite of many experimental efforts, the amount of F synthesized still suffers from large uncertainties concerning mainly the F(p,α)O reaction. We report here on a new direct measurement of the F (p,α)O cross section recently carried out at the RIB facility at Louvain-la-Neuve. Cross section data down to a center-of-mass energy of 400 keV have been obtained using an isobarically pure F beam (averaged intensity of the order of 10 pps) and a thin polyethylene target. The reaction products were detected using the multi-strip detector array LEDA. The cross section data are analysed in the framework of the R-matrix model. Our main aim is to determine the interference sign between three 3/2 resonances above threshold that can significantly affect the extrapolation of the F(p,α)O cross section to the energies relevant for novae, and thus, the modeling of nova explosions. © EDP Sciences/Societé Italiana di Fisica/Springer-Verlag 2007.
Original languageEnglish
Pages (from-to)211-214
Number of pages4
JournalEuropean Physical Journal - Special Topics
Volume150
Issue number1
DOIs
Publication statusPublished - 1 Nov 2007

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