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THE 10TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: OMEG-2010, Osaka : Japon (2010)
The Trojan Horse Method as a tool to investigate low-energy resonances: the 18O(p, α)15N and 17O(p, α)14N cases
M. La Cognata, M. L. Sergi, C. Spitaleri, A. Mukhamedzhanov, A. Coc1, S. Cherubini, V. Goldberg, M. Gulino, F. Hammache2, B. Irgaziev, G. Kiss, L. Lamia, R. G. Pizzone, S. Romano, N. De Sereville2, R. Tribble, A. Tumino
(08/2010)

The 18O(p, α)15N and 17O(p, α)14N reactions are of primary importance in several as-trophysical scenarios, including nucleosynthesis inside Asymptotic Giant Branch stars and oxygen and nitrogen isotopic ratios in meteorite grains. They are also key reactions to understand exotic systems such as R-Coronae Borealis stars and novae. Thus, the measurement of their cross sections in the low energy region can be crucial to reduce the nuclear uncertainty on theoretical predictions, because the resonance parameters are poorly determined. The Trojan Horse Method, in its newly developed form particularly suited to investigate low-energy resonances, has been applied to the 2H(18O, α15N)n and 2H(17O, α14N)n reactions to deduce the 18O(p, α)15N and 17O(p, α)14N cross sections at low energies. Resonances in the 18O(p, α)15N and 17O(p, α)14N excitation functions have been studied and the resonance parameters deduced.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
2 :  IPNO - Institut de Physique Nucléaire d'Orsay
Physique/Physique Nucléaire Expérimentale

Physique/Astrophysique/Astrophysique stellaire et solaire

Planète et Univers/Astrophysique/Astrophysique stellaire et solaire
resonance reactions and scattering – nuclear – nucleosynthesis – novae – transfer functions – normalising – Resonance reactions – Origin – formation – and abundances of the elements – Cataclysmic binaries – symbiotic stars – Transfer reactions – Spectroscopic factors and asymptotic normalization coefficients