High-energy Neutron-induced Fission Cross Sections of Natural Lead and Bismuth-209

Tarrno, D.; Tassan Got, L.; Audouin, L.; Berthier, B.; Ferrant, L.; Isaev, S.; Naour C., Le; Stephan, C.; Trubert, D.; David, S.; Duran, I.; Paradela, C.; Alvarez, H.; Abbondanno, U.; Fujii, K.; Stephan, C.; Trubert, D.; David, S.; Duran, I.; Paradela, C.; Alvarez, H.; Abbondanno, U.; Fujii, K.; Milazzo, P. M.; Moreau, C.; Aerts, G.; Alvarez Velarde, F.; Cano Ott, D.; Embid Segura, M.; Gonzalez Romero, E.; Guerrero, C.; Martinez, T.; Villamarin, D.; Vicente, M. C.; Andriamonje, S.; Berthoumieux, E.; Dridi, W.; Gunsig, F.; Pancin, J.; Perrot, L.; Plukis, A.; Andrzejewski, J.; Marganiec, J.; Assimakopoulos, P.; Karadimos, D.; Karamanis, D.; Papachristodoulou, C.; Patronis, N.; Badurek, G.; Jericha, E.; Leeb, H.; Oberhummer, H.; Pigni, M. T.; Baumann, P.; Kerveno, M.; Lukic, S.; Rudolf, G.; Becvar, F.; Krticka, M.; Calvino, F.; Cortes, G.; Poch, A.; Pretel, C.; Calviani, M.; Gramegna, F.; Mastinu, P.; Praena, J.; Capote, R.; Carrapico, C.; Cennini, P.; Chiaveri, E.; Dahlfors, M.; Ferrari, A.; Goncalves, I.; Herrera Martinez, A.; Kadi, Y.; Sarchiapone, L.; Vlachoudis, V.; Chepel, V.; Ferreira Marques, R.; Lindote, A.; Lopes, I.; Neves, F.; Colonna, N.; Tagliente, G.; Terlizzi, R.; Couture, A.; Cox, J.; Marrone, S.; Obrien, S.; Wiescher, M.; Dillmann, I.; Heil, M.; Kappeler, F.; Mosconi, M.; Voss, F.; Walter, S.; Wisshak, K.; Domingo Pardo, C.; Plag, R.; Plompen, A.; Tain, J. L.; Eleftheriadis, C.; Savvidis, I.; Furman, W.; Haas, B.; Haight, R.; Reifarth, R.; Igashira, M.; Koehler, P.; Kossionides, E.; Lampoudis, C.; Lozano, M.; Quesada, J.; Massimi, Cristian; Vannini, Gianni; Mengoni, A.; Oshima, M.; Papadopoulos, C.; Pavlik, A.; Pavlopoulos, P.; Vlastou, R.; Rauscher, T.; Rubbia, C.; Rullhusen, P.; Salgado, J.; Santos, C.; Tavora, L.; Vaz, P.; Ventura, A.

doi:10.3938/jkps.59.1904

The CERN Neutron Time-Of-Flight (n_TOF) facility is well suited to measure small neutron-induced fission cross sections, as those of subactinides. The cross section ratios of (nat)Pb and (209)Bi relative to (235)U and (238)U were measured using PPAC detectors. The fragment coincidence method allows to unambiguously identify the fission events. The present experiment provides the first results for neutron-induced fission up to 1 GeV for (nat)Pb and (209)Bi. A good agreement with previous experimental data below 200 MeV is shown. The comparison with proton-induced fission indicates that the limiting regime where neutron-induced and proton-induced fission reach equal cross section is close to 1 GeV.

Tarrno D., Tassan-Got L., Audouin L., Berthier B., Ferrant L., Isaev S., et al. (2011). High-energy Neutron-induced Fission Cross Sections of Natural Lead and Bismuth-209. JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 59, 1904-1-1904-4 [10.3938/jkps.59.1904].