Measurements of high-energy neutron-induced fission of (nat)Pb and (209)Bi
Tarrio, D., Tassan-Got, L., Audouin, L., Berthier, B., Duran, I., Ferrant, L., Isaev, S., Le Naour, C., Paradela, C., Stephan, C., Trubert, D., Abbondanno, U., Aerts, G., Alvarez, H., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Badurek, G., Baumann, P., Becvar, F., Berthoumieux, E., Calvino, F., Calviani, M., Cano-Ott, D., Capote, R., Carrapico, C., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Couture, A., Cox, J., Dahlfors, M., David, S., Dillmann, I., Domingo-Pardo, C., Dridi, W., Eleftheriadis, C., Embid-Segura, M., Ferrari, A., Ferreira-Marques, R., Fujii, K., Furman, W., Goncalves, I., Gonzalez-Romero, E., Gramegna, F., Guerrero, C. and Rauscher, T.
(2010)
Measurements of high-energy neutron-induced fission of (nat)Pb and (209)Bi.
In: EFNUDAT Users and Collaboration Workshop on Measurements and Models of Nuclear Reactions, 2010-05-25 - 2010-05-27.
The CERN Neutron Time-Of-Flight (n_TOF) facility is well suited to measure low cross sections as those of neutron-induced fission in subactinides. The cross section ratios of (nat)Pb and (209)Bi relative to (235)U and (238)U were measured using PPAC detectors and a fragment coincidence method that allows us to identify the fission events. The present experiment provides first results for neutron-induced fission up to 1 GeV. Good agreement is found with previous experimental data below 200 MeV. The comparison with proton-induced fission indicates that the limiting regime where neutron-induced and proton-induced fission reach equal cross sections is close to 1 GeV.
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