Hydrogen Burning of $^{17}$O in Classical Novae
Langue
en
Article de revue
Ce document a été publié dans
Physical Review Letters. 2005, vol. 95, p. 031101 (4 pages)
American Physical Society
Résumé en anglais
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 ...Lire la suite >
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.< Réduire
Mots clés en anglais
proton-nucleus reactions
proton radiative capture
alpha particle-nucleus reactions
novae
nuclear energy level transitions
nucleosynthesis
Origine
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