H-2(F-18,p alpha)N-15 reaction applied to nova gamma-ray emission

de Sereville, N; Coc, A; Angulo, C; Assuncao, M; Beaumel, D; Bouzid, B; Cherubini, Silvio; Couder, M; Demaret, P; Santos, Fd; Figuera, P; Fortier, S; Gaelens, M; Hammache, F; Kiener, J; Lefebvre, A; Labar, D; Leleux, P; Loiselet, M; Ninane, A; Ouichaoui, S; Ryckewaert, G; Smirnova, N; Tatischeff, V; Thibaud, Jp

doi:10.1103/PhysRevC.67.052801

The F-18(p,alpha)O-15 reaction is recognized to be one of the most important reactions for nova gamma-ray astronomy, as it governs the early Eless than or equal to511 keV gamma emission. However, in the nova temperature regime, its rate remains largely uncertain due to unknown low-energy resonance strengths. We report here the measurement of the H-2(F-18,p)F-19(alpha)N-15 one-nucleon transfer reaction, induced by a 14-MeV F-18 radioactive beam impinging on a CD2 target; outgoing protons and N-15 (or alpha particles) were detected in coincidence in two silicon strip detectors. A distorted-wave Born approximation analysis of the data resulted in new limits to the contribution of low-energy resonances to the rate of the F-18(p,alpha)O-15 reaction.

Titolo:	H-2(F-18,p alpha)N-15 reaction applied to nova gamma-ray emission
Autori interni:	de Sereville N Coc A Angulo C Assuncao M Beaumel D Bouzid B CHERUBINI, SILVIO Couder M Demaret P Santos FD Figuera P Fortier S Gaelens M Hammache F Kiener J Lefebvre A Labar D Leleux P Loiselet M Ninane A Ouichaoui S Ryckewaert G Smirnova N Tatischeff V Thibaud JP mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2003
Rivista:	PHYSICAL REVIEW. C, NUCLEAR PHYSICS
Abstract:	The F-18(p,alpha)O-15 reaction is recognized to be one of the most important reactions for nova gamma-ray astronomy, as it governs the early Eless than or equal to511 keV gamma emission. However, in the nova temperature regime, its rate remains largely uncertain due to unknown low-energy resonance strengths. We report here the measurement of the H-2(F-18,p)F-19(alpha)N-15 one-nucleon transfer reaction, induced by a 14-MeV F-18 radioactive beam impinging on a CD2 target; outgoing protons and N-15 (or alpha particles) were detected in coincidence in two silicon strip detectors. A distorted-wave Born approximation analysis of the data resulted in new limits to the contribution of low-energy resonances to the rate of the F-18(p,alpha)O-15 reaction.
Handle:	http://hdl.handle.net/20.500.11769/53315
Appare nelle tipologie:	1.1 Articolo in rivista

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