Measurement of the 10 keV resonance in the B-10(p,alpha(0))Be-7 reaction via the Trojan Horse method

0433622 - ÚJF 2015 RIV US eng J - Článek v odborném periodiku
Spitaleri, C. - Lamia, L. - Puglia, S. M. R. - Romano, S. - La Cognata, M. - Crucilla, V. - Pizzone, R. G. - Rapisarda, G. G. - Sergi, M. L. - Del Santo, M. G. - Carlin, N. - Munhoz, M. G. - Souza, F. A . - de Toledo, A. S. - Tumino, A. - Irgaziev, B. - Mukhamedzhanov, A. - Tabacaru, G. - Burjan, Václav - Kroha, Václav - Hons, Zdeněk - Mrázek, Jaromír - Zhou, S. H. - Li, C. B. - Wen, Q. G. - Wakabayashi, Y. - Yamaguchi, H. - Somorjai, E.
Measurement of the 10 keV resonance in the B-10(p,alpha(0))Be-7 reaction via the Trojan Horse method.
Physical Review. C. Roč. 90, č. 3 (2014), 035801. ISSN 0556-2813
Grant CEP: GA MŠMT LC07050; GA MŠMT(CZ) LH11001
Institucionální podpora: RVO:61389005
Klíčová slova: Trojan Horse method * nuclear astrophysics * cross-section
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 3.733, rok: 2014

The B-10(p,alpha(0))Be-7 bare nucleus astrophysical S(E) factor has been measured for the first time at energies from about 100 keV down to about 5 keV by means of the Trojan Horse method (THM). In this energy region, the S(E) factor is strongly dominated by the 8.699 MeV C-11 level (J(pi) = 5/2(+)), producing an s-wave resonance centered at about 10 keV in the entrance channel. Up to now, only the high-energy tail of this resonance has been measured, while the low-energy trend is extrapolated from the available direct data. The THM has been applied to the quasifree H-2(B-10,alpha(0) Be-7)n reaction induced at a boron-beam energy of 24.5 MeV. An accurate analysis leads to the determination of the B-10(p,alpha(0))Be-7 S(E) factor and of the corresponding electron screening potential U-e, thus giving for the first time an independent evaluation of it.
Trvalý link: http://hdl.handle.net/11104/0237822