New high accuracy measurement of the 17O(p,α)14N reaction rate at astrophysical temperatures

M.L. Sergi , C. Spitaleri , M. La Cognata , A. Coc (1) , A. Mukhamedzhanov , S.V. Burjan , S. Cherubini , V. Crucillá , M. Gulino , F. Hammache (2) , Z. Hons , B. Irgaziev , G.G. Kiss , V. Kroha , L. Lamia , R.G. Pizzone , S. M. R. Puglia , G.G. Rapisarda , S. Romano , N. de Séréville (2) , E. Somorjai , S. Tudisco , A. Tumino

1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
2 IPNO - Institut de Physique Nucléaire d'Orsay

The 17O(p,α)14N reaction is of fundamental relevance in several astrophysical scenarios, such as novae, asymptotic giant branch nucleosynthesis, and γ-ray astronomy. We report on the indirect measurement of the 17O(p,α)14N reaction bare-nucleus cross section in the low-energy region. In particular, the two resonances at ERc.m.=65 keV and ERc.m.=183  keV, which dominate the reaction rate inside the Gamow window, have been observed, and the strength of the 65 keV resonance has been deduced. The reaction rate determination and the comparison with the results of the previous measurements are also discussed.

Domaines: Astrophysique stellaire et solaire [astro-ph.SR]; Astrophysique stellaire et solaire [astro-ph.SR]

M.L. Sergi, C. Spitaleri, M. La Cognata, A. Coc, A. Mukhamedzhanov, et al.. New high accuracy measurement of the 17O(p,α)14N reaction rate at astrophysical temperatures. Physical Review C, 2010, 82, pp.032801. ⟨10.1103/PhysRevC.82.032801⟩. ⟨in2p3-00522368⟩