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

0348012 - ÚJF 2011 RIV US eng J - Článek v odborném periodiku
Sergi, M. L. - Spitaleri, C. - La Cognata, M. - Coc, A. - Mukhamedzhanov, A. - Burjan, Václav - Cherubini, S. - Crucilla, V. - Gulino, M. - Hammache, F. - Hons, Zdeněk - Irgaziev, B. - Kiss, G.G. - Kroha, Václav - Lamia, L. - Pizzone, R. G. - Puglia, S. M. R. - Rapisarda, G. G. - Romano, S. - de Sereville, N. - Somorjai, E. - Tudisco, S. - Tumino, A.
New high accuracy measurement of the O-17(p,alpha)N-14 reaction rate at astrophysical temperatures.
Physical Review. C. Roč. 82, č. 3 (2010), 032801/1-032801/5. ISSN 0556-2813
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: ASYMPTOTIC GIANT BRANCH * CNO CYCLE * NUCLEAR ASTROPHYSICS
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 3.416, rok: 2010

The O-17(p,alpha)N-14 reaction is of fundamental relevance in several astrophysical scenarios, such as novae, asymptotic giant branch nucleosynthesis, and.-ray astronomy. We report on the indirect measurement of the O-17(p,alpha)N-14 reaction bare-nucleus cross section in the low-energy region. In particular, the two resonances at E-R(c.m.) = 65 keV and E-R(c.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.
Trvalý link: http://hdl.handle.net/11104/0188640