Neutron-induced fission cross section of U234 measured at the CERN n_TOF facility

The neutron-induced fission cross section of U234 has been measured at the CERN n_TOF facility relative to the standard fission cross section of U235 from 20 keV to 1.4 MeV and of U238 from 1.4 to 200 MeV. A fast ionization chamber (FIC) was used as a fission fragment detector with a detection effic...

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Detalles Bibliográficos
Autores principales: Karadimos, D, Vlastou, R, Ioannidis, K, Demetriou, P, Diakaki, M, Vlachoudis, V, Pavlopoulos, P, Konovalov, V, Abbondanno, U, Aerts, G, Álvarez, H, Alvarez-Velarde, F, Andriamonje, S, Andrzejewski, J, Assimakopoulos, P, Audouin, L, Badurek, G, Baumann, P, Bečvář, F, Berthoumieux, E, Calviño, F, Cano-Ott, D, Capote, R, Carrillo de Albornoz, A, Chepel, V, Chiaveri, E, Colonna, N, Cortes, G, Couture, A, Cox, J, David, S, Dolfini, R, Domingo-Pardo, C, Dorochenko, A, Dridi, W, Duran, I, Eleftheriadis, Ch, Embid-Segura, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Fitzpatrick, L, Frais-Koelbl, H, Fuji, K, Furman, W, Goncalves, I, Gallino, R, Cennini, P, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Guerrero, C, Gunsing, F, Haas, B, Haight, R, Heil, M, Herrera-Martinez, A, Igashira, M, Isaev, S, Jericha, E, Kadi, Y, Käppeler, F, Karamanis, D, Kerveno, M, Ketlerov, V, Koehler, P, Kolokolov, D, Krtička, M, Lamboudis, C, Leeb, H, Lindote, A, Lopes, I, Lozano, M, Lukic, S, Marganiec, J, Marques, L, Marrone, S, Massimi, C, Mastinu, P, Mengoni, A, Milazzo, P M, Moreau, C, Mosconi, M, Neves, F, Oberhummer, H, O'Brien, S, Oshima, M, Pancin, J, Papadopoulos, C, Paradela, C, Patronis, N, Pavlik, A, Perrot, L, Plag, R, Plompen, A, Plukis, A, Poch, A, Pretel, C, Quesada, J, Rauscher, T, Reifarth, R, Rosetti, M, Rubbia, C, Rudolf, G, Rullhusen, P, Salgado, J, Sarchiapone, L, Savvidis, I, Sedysheva, M, Stamoulis, K, Stephan, C, Tagliente, G, Tain, J L, Tassan-Got, L, Tavora, L, Terlizzi, R, Tsinganis, A, Vannini, G, Vaz, P, Ventura, A, Villamarin, D, Vincente, M C, Voss, F, Wendler, H, Wiescher, M, Wisshak, K
Lenguaje:eng
Publicado: 2014
Materias:
Nuclear Reactions
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.89.044606
http://cds.cern.ch/record/2011648
Descripción
Sumario:The neutron-induced fission cross section of U234 has been measured at the CERN n_TOF facility relative to the standard fission cross section of U235 from 20 keV to 1.4 MeV and of U238 from 1.4 to 200 MeV. A fast ionization chamber (FIC) was used as a fission fragment detector with a detection efficiency of no less than 97%. The high instantaneous flux and the low background characterizing the n_TOF facility resulted in wide-energy-range data (0.02 to 200 MeV), with high energy resolution, high statistics, and systematic uncertainties bellow 3%. Previous investigations around the energy of the fission threshold revealed structures attributed to β-vibrational levels, which have been confirmed by the present measurements. Theoretical calculations have been performed, employing the talys code with model parameters tuned to fairly reproduce the experimental data.

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