| HAL : in2p3-00024492, version 1 |
| arXiv : astro-ph/0506500 |
| DOI : 10.1103/PhysRevLett.95.031101 |
| Fiche détaillée | Récupérer au format |
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| Physical Review Letters 95 (2005) 031101 (4 pages) |
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| Hydrogen Burning of $^{17}$O in Classical Novae |
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| A. ChafaV. Tatischeff1P. Aguer2S. BarhoumiA. Coc1F. Garrido1M. HernanzJ. JoseJ. Kiener1A. Lefebvre-Schuhl1S. OuichaouiN. De Sereville1J. -P. Thibaud1 |
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| (2005) |
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| We report on the observation of a previously unknown resonance at E=194.1+/-0.6 keV (lab) in the 17-O(p,alpha)14-N reaction, with a measured resonance strength omega_gamma(p,alpha)=1.6+/-0.2 meV. We studied in the same experiment the 17-O(p,gamma)18-F reaction by an activation method and the resonance-strength ratio was found to be omega_gamma(p,alpha)/omega_gamma(p,gamma)=470+/-50. The corresponding excitation energy in the 18-F compound nucleus was determined to be 5789.8+/-0.3 keV by gamma-ray measurements using the 14-N(alpha,gamma)18-F reaction. These new resonance properties have important consequences for 17-O nucleosynthesis and gamma-ray astronomy of classical novae. |
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| 1 : | CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse |
| 2 : | CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan |
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| Thème(s) | : | Physique/Astrophysique/Cosmologie et astrophysique extra-galactique Physique/Physique Nucléaire Expérimentale Planète et Univers/Astrophysique |
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| proton-nucleus reactions – proton radiative capture – alpha particle-nucleus reactions – novae – nuclear energy level transitions – nucleosynthesis |
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| Lien vers le texte intégral : |
| in2p3-00024492, version 1 | |
| http://hal.in2p3.fr/in2p3-00024492 | |
| oai:hal.in2p3.fr:in2p3-00024492 | |
| Contributeur : Dominique Girod | |
| Soumis le : Mercredi 24 Août 2005, 15:49:59 | |
| Dernière modification le : Vendredi 4 Juillet 2008, 09:58:18 | |