Discovery of a New Broad Resonance in {sup 19}Ne: Implications for the Destruction of the Cosmic {gamma}-Ray Emitter {sup 18}F
- Grand Accelerateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, B.P. 55027, F-14076 Caen Cedex 5 (France)
- Laboratoire de Physique Corpusculaire ENSICAEN, CNRS-IN2P3 UMR 6534 et Universite de Caen, F-14050 Caen (France)
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
- Centre de Recherche du Cyclotron, Universite catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium)
- CSNSM UMR 8609, CNRS-IN2P3/Universite Paris-Sud, Batiment 104, 91405 Orsay Campus (France)
- Horia Hulubei National Institute of Physics and Nuclear Engineering, P.O. Box MG6, Bucharest-Margurele (Romania)
Six proton-emitting states in {sup 19}Ne were studied through the inelastic scattering reaction H({sup 19}Ne,p){sup 19}Ne{sup *}(p){sup 18}F. Their energies and widths were derived from the protons detected at zero degree, while proton-proton angular correlations between the detector at zero degree and a segmented annular detector were used to determine their spin value. In addition to the known states, a new broad J=(1/2) resonance has been evidenced at E{sub x}{approx_equal}7.9 MeV, {approx_equal}1.45 MeV above the proton emission threshold. By introducing this resonance, the {sup 18}F(p,{alpha}){sup 15}O destruction rate in novae is significantly enhanced. This reduces the chance to observe the cosmic {gamma}-ray emission of {sup 18}F from novae in space telescopes.
- OSTI ID:
- 21316638
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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