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Author(s)
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Karadimos, D ; Vlastou, R ; Ioannidis, K ; Demetriou, P ; Diakaki, M ; Vlachoudis, V (CERN) ; 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 (CERN) ; 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 (CERN) ; Ferreira-Marques, R ; Fitzpatrick, L (CERN) ; Frais-Koelbl, H ; Fuji, K ; Furman, W ; Goncalves, I ; Gallino, R ; Cennini, P (CERN) ; Gonzalez-Romero, E ; Goverdovski, A ; Gramegna, F ; Griesmayer, E ; Guerrero, C ; Gunsing, F ; Haas, B ; Haight, R ; Heil, M ; Herrera-Martinez, A (CERN) ; Igashira, M ; Isaev, S ; Jericha, E ; Kadi, Y (CERN) ; 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 (CERN) ; 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 (CERN) ; 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 (CERN) ; Wiescher, M ; Wisshak, K |
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Abstract
| 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. |