Application of the Trojan Horse Method to study neutron induced reactions: the O-17(n, alpha)C-14 reaction

0435749 - ÚJF 2015 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Gulino, M. - Spitaleri, C. - Guardo, G. L. - Lamia, L. - Cherubini, S. - Burjan, Václav - Hons, Zdeněk - Kroha, Václav - La Cognata, M. - Mrázek, Jaromír … celkem 30 autorů
Application of the Trojan Horse Method to study neutron induced reactions: the O-17(n, alpha)C-14 reaction.
EPJ Web of Conferences. Les Ulis: E D P Sciences, 2014, 07008. ISBN 978-2-7598-1176-2. ISSN 2100-014X.
[International Nuclear Physics Conference (INPC 2013). Firenze (IT), 02.06.2013-07.06.2013]
Grant CEP: GA MŠMT(CZ) LH11001; GA ČR GAP203/10/0310
Institucionální podpora: RVO:61389005
Klíčová slova: cross-section * elements * C-14
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika

The reaction O-17( n,alpha)C-14 was studied using virtual neutrons coming from the quasi-free deuteron break-up in the three body reaction O-17+d -> alpha+C-14+p. This technique, called virtual neutron method, extends the Trojan Horse method to neutron-induced reactions allowing to study the reaction cross section avoiding the suppression effects coming from the penetrability of the centrifugal barrier. For incident neutron energies from thermal up to a few hundred keV, direct experiments have shown the population of two out of three expected excited states at energies 8213 keV and 8282 keV and the influence of the sub-threshold level at 8038 keV. In the present experiment the O-18 excited state at E* = 8.125 MeV, missing in the direct measurement, is observed. The angular distributions of the populated resonances have been measured for the first time. The results unambiguously indicate the ability of the method to overcome the centrifugal barrier suppression effect and to pick out the contribution of the bare nuclear interaction.
Trvalý link: http://hdl.handle.net/11104/0239645