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Nuclear Physics in Astrophysics IV, Frascati : Italie (2009)
First measurement of the 18O(p,α)15N cross section at astrophysical energies
M. La Cognata, C. Spitaleri, A. Mukhamedzhanov, R. E. Tribble, T. Al-Abdullah, A. Banu, S. Cherubini, A. Coc1, V. Crucillà, V. Goldberg, M. Gulino, B. Irgaziev, G. G. Kiss, L. Lamia, J. Mrazek, R. G. Pizzone, S. M. R. Puglia, G. G. Rapisarda, S. Romano, M. L. Sergi, G. Tabacaru, L. Trache, W. Trzaska, S. Tudisco, A. Tumino
(01/2010)

The 18O(p,α)15N reaction rate has been deduced by means of the Trojan horse method. For the first time the contribution of the 20 keV resonance has been directly evaluated, giving a value about 35% larger than the one in the literature. Moreover, the present approach has allowed to improve the accuracy by a factor 8.5, as it is based on the measured strength instead of spectroscopic measurements. The contribution of the 90 keV resonance has been also determined, which turned out to be of negligible importance to astrophysics.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Physique/Physique Nucléaire Expérimentale

Physique/Astrophysique/Astrophysique stellaire et solaire

Planète et Univers/Astrophysique/Astrophysique stellaire et solaire