New measurement of the B-11(p,alpha(0))Be-8 bare-nucleus S(E) factor via the Trojan horse method

0388579 - ÚJF 2013 RIV GB eng J - Journal Article
Lamia, L. - Spitaleri, C. - Burjan, Václav - Carlin, N. - Cherubini, S. - Crucilla, V. - Munhoz, M. G. - Del Santo, M. G. - Gulino, M. - Hons, Zdeněk - Kiss, G. G. - Kroha, Václav - Kubono, S. - La Cognata, M. - Li, C. - Mrázek, Jaromír - Mukhamedzhanov, A. - Pizzone, R. G. - Puglia, S. M. R. - Wen, Q. - Rapisarda, G. G. - Rolfs, C. - Romano, S. - Sergi, M. L. - Somorjai, E. - Souza, F. A . - de Toledo, A. S. - Tabacaru, G. - Tumino, A. - Wakabayashi, Y. - Yamaguchi, H. - Zhou, S. H.
New measurement of the B-11(p,alpha(0))Be-8 bare-nucleus S(E) factor via the Trojan horse method.
Journal of Physics G-Nuclear and Particle Physics. Roč. 39, č. 1 (2012), 015106/1-015106/23. ISSN 0954-3899. E-ISSN 1361-6471
R&D Projects: GA AV ČR IAA100480902; GA ČR GAP203/10/0310
Institutional support: RVO:61389005
Keywords : astrophysical reactions * Trojan horse method
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 5.326, year: 2012

A new measurement of the 11 B(p,α0) 8 Be has been performed applying the Trojan horse method (THM) to the 2 H( 11 B,α 8 0 Be)n quasi-free reaction induced at a laboratory energy of 27 MeV. The astrophysical S(E) factor has been extracted from =600 keV down to zero energy by means of an improved data analysis technique and it has been compared with direct data available in the literature. The range investigated here overlaps with the energy region of the light element LiBeB stellar burning and with that of future aneutronic fusion power plants using the 11 B+p fuel cycle. The new investigation described here confirms the preliminary results obtained in the recent TH works. The origin of the discrepancy between the direct estimate of the 11 B(p,α0) 8 Be S(E)-factor at zero energy and that from a previous THM investigation is quantitatively corroborated. The results obtained here support, within the experimental uncertainties, the low-energy S(E)-factor extrapolation and the value of the electron screening potential deduced from direct measurements.
Permanent Link: http://hdl.handle.net/11104/0217561