New High-Precision Measurement of the Reaction Rate of the O-18(p, alpha)N-15 Reaction via THM

0338844 - ÚJF 2010 RIV AU eng J - Journal Article
La Cognata, M. - Spitaleri, C. - Mukhamedzhanov, A. M. - Irgaziev, B. - Tribble, R. E. - Banu, A. - Cherubini, S. - Coc, A. - Crucilla, V. - Goldberg, V. Z. - Gulino, M. - Kiss, G. G. - Lamia, L. - Chengbo, L. - Mrázek, Jaromír - Pizzone, R. G. - Puglia, S. M. R. - Rapisarda, G. G. - Romano, S. - Sergi, M. L. - Tabacaru, G. - Trache, L. - Trzaska, W. - Tumino, A.
New High-Precision Measurement of the Reaction Rate of the O-18(p, alpha)N-15 Reaction via THM.
Publications of the Astronomical Society of Australia. Roč. 26, č. 3 (2009), s. 237-242. ISSN 1323-3580. E-ISSN 1448-6083
Institutional research plan: CEZ:AV0Z10480505
Keywords : nuclear reactions * nucleosynthesis * abundances
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.786, year: 2009

The O-18(p, alpha)N-15 reaction rate has been extracted by means of the Trojan-Horse method. For the first time the contribution of the 20-keV peak has been directly evaluated, giving a value about 35% larger than previously estimated. The present approach has allowed to improve the accuracy of a factor 8.5, as it is based on the measured strength instead of educated guesses or spectroscopic measurements. The contribution of the 90-keV resonance has been determined as well, which turned out to be of negligible importance to astrophysics.
Permanent Link: http://hdl.handle.net/11104/0182507