Experimental Study of 17O(p,{alpha})14N and 17O(p,{gamma})18F for Classical Nova Nucleosynthesis
- USTHB-Faculte de Physique, BP 32, El-Alia, 16111 Bab Ezzouar, Algiers (Algeria)
- CSNSM, IN2P3-CNRS, F-91405 Orsay Cedex (France)
- CENBG, IN2P3-CNRS, F-33175 Gradignan (France)
- UMBM, B.P. 166, Route ICHBILLIA, 28000 M'sila (Algeria)
- Institut de Ciencies de l'Espai (CSIC), E-08034 Barcelona (Spain)
- Departament de Fisica i Enginyeria Nuclear (UPC), E-08034 Barcelona (Spain)
We investigated the proton-capture reactions on 17O occurring in classical nova explosions. We observed a previously undiscovered resonance at E{sub R}{sup lab}=194.1{+-}0.6 keV in the 17O(p,{alpha})14N reaction, with a measured resonance strength {omega}{gamma}p{alpha}=1.6{+-}0.2 meV. We studied in the same experiment the 17O(p,{gamma})18F 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 18F compound nucleus was determined to be 5789.8{+-}0.3 keV by {gamma}-ray measurements using the 14N({alpha},{gamma})18F reaction. These new resonance properties have important consequences for 17O nucleosynthesis and {gamma}-ray astronomy of classical novae.
- OSTI ID:
- 20798551
- Journal Information:
- AIP Conference Proceedings, Vol. 831, Issue 1; Conference: International conference on frontiers in nuclear structure, astrophysics, and reactions - FINUSTAR, Isle of Kos (Greece), 12-17 Sep 2005; Other Information: DOI: 10.1063/1.2200943; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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