First measurement of the O-18(p, alpha)N-15 cross section at astrophysical energies

0486831 - ÚJF 2018 GB eng C - Konferenční příspěvek (zahraniční konf.)
La Cognata, M. - Spitaleri, C. - Mukhamedzhanov, A. - Tribble, R. E. - Al-Abdullah, T. - Banu, A. - Cherubini, S. - Coc, A. - Crucilla, V. - Goldberg, V. - Gulino, M. - Irgaziev, B. - Kiss, G. G. - Lamia, L. - Mrázek, Jaromír - Pizzone, R. G. - Puglia, S. M. R. - Rapisarda, G. G. - Romano, S. - Sergi, M. L. - Tabacaru, G. - Trache, L. - Trzaska, W. - Tudisco, S. - Tumino, A.
First measurement of the O-18(p, alpha)N-15 cross section at astrophysical energies.
Journal of Physics: Conference Series. Vol. 202. Bristol: IOP Publishing, 2010, č. článku 012019. ISSN 1742-6588.
[4th International Conference on Nuclear Physics in Astrophysics. Frascati (IT), 08.06.2009-12.06.2009]
Institucionální podpora: RVO:61389005
Klíčová slova: spectroscoic measurements * astrophysics * resonance
Obor OECD: Astronomy (including astrophysics,space science)

The O-18(p, alpha)N-15 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.
Trvalý link: http://hdl.handle.net/11104/0281544