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Phys. Rev. C 67, 052801(R) (2003) [4 pages]

2H(18F,pα)15N reaction applied to nova γ-ray emission

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N. de Séréville1, A. Coc1, C. Angulo2, M. Assunção1, D. Beaumel3, B. Bouzid4, S. Cherubini2,*, M. Couder2, P. Demaret2, F. de Oliveira Santos5, P. Figuera6, S. Fortier3, M. Gaelens3, F. Hammache7,†, J. Kiener1, A. Lefebvre1, D. Labar2, P. Leleux2, M. Loiselet2, A. Ninane2, S. Ouichaoui4, G. Ryckewaert2, N. Smirnova8, V. Tatischeff1, and J.-P. Thibaud1
1CSNSM, IN2P3/CNRS and Université Paris-Sud, F-91405 Orsay Campus, France
2Université Catholique de Louvain, Chemin du Cyclotron 2, B-1348 Louvain-la-Neuve, Belgium
3IPN, IN2P3/CNRS and Université Paris-Sud, F-91406 Orsay Cedex, France
4USTHB, Boîte Postale 32, El-Alia, Bab Ezzouar, Algiers, Algeria
5GANIL, Boîte Postale 5027, 14021 Caen Cedex, France
6Laboratori Nazionali del Sud, INFN, Via S. Sofia, 44, 95123 Catania, Italy
7GSI mbH, Planckstrasse 1, D-64291 Darmstadt, Germany
8Instituut voor Kern en Stralingsfysika, Celestijnenlaan 200D, B-3001 Leuven, Belgium

Received 30 January 2003; published 22 May 2003

The 18F(p,α)15O reaction is recognized to be one of the most important reactions for nova γ-ray astronomy, as it governs the early E<~511keV γ 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 2H(18F,p)19F(α)15N one-nucleon transfer reaction, induced by a 14-MeV 18F radioactive beam impinging on a CD2 target; outgoing protons and 15N (or α 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 18F(p,α)15O reaction.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.052801
DOI:
10.1103/PhysRevC.67.052801
PACS:
25.60.Je, 21.10.Jx, 26.30.+k, 27.20.+n

*Present address: EP3, Ruhr-Universität-Bochum, Bochum, Germany.

†Permanent address: IPN, IN2P3/CNRS and Université Paris-Sud, F-91406 Orsay Cedex, France.

 
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