Neutron-induced fission cross section of Np-237 in the keV to MeV range at the CERN n_TOF facility

, Maria Diakaki, Dimitrios Karadimos, Rosa Vlastou, Michael Kokkoris, Paraskevi Demetriou, Eleftherios Skordis, Andrea Tsinganis, U. Abbondanno, G. Aerts, H. Alvarez, Francisco Alvarez-Velarde, Samuel Andriamonje, Józef Andrzejewski, P. Assimakopoulos, Ludmila Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, M. Calviani, F. Calvino, D. Cano-Ott, R. Capote, A. Carrillo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, S. David, R. Dolfini, C. Domingo-Pardo, A. Dorochenko, W. Dridi, I. Duran, Ch. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, L. Fitzpatrick, H. Frais-Koelbl, K. Fuji, W. Furman, I. Goncalves, R. Gallino, E. Gonzalez-Romero, Andreas Pavlik, Heinz Oberhummer

The neutron-induced fission cross section of Np-237 was experimentally determined at the high-resolution and high-intensity facility n_TOF, at CERN, in the energy range 100 keV to 9 MeV, using the U-235(n, f) and U-238(n, f) cross section standards below and above 2 MeV, respectively. A fast ionization chamber was used in order to detect the fission fragments from the reactions and the targets were characterized as far as their mass and homogeneity are concerned by means of a spectroscopy and Rutherford backscattering spectroscopy respectively. Theoretical calculations within the Hauser-Feshbach formalism have been performed, employing the EMPIRE code, and the model parameters were tuned in order to successfully reproduce the experimental fission cross-sectional data and simultaneously all the competing reaction channels.

Externe Organisation(en)
Università degli Studi di Torino, International Atomic Energy Agency (IAEA), French Atomic Energy Commission (CEA), National Technical University of Athens (NTUA), European Organization for Nuclear Research (CERN), Istituto Nazionale di Fisica Nucleare, Roma, Universidade de Santiago de Compostela (USC), Centro de Investigaciones Energeticas Medioambientales y Tecnológica, University of Lodz, University of Ioannina, Centre National De La Recherche Scientifique (CNRS), National Institute of Nuclear & Particle Physics (CNRS) IN2P3, IReS, Charles University Prague, Universitat Politècnica de Catalunya, Universidade de Lisboa, Universidade de Coimbra, University of Notre Dame, Università degli studi di Pavia, Instituto de Física Corpuscular (IFIC), Institute of Physics and Power Engineering (IPPE), Aristotle University of Thessaloniki, Fachhochschule Wiener Neustadt, Joint Institute for Nuclear Research, Universität Wien
Physical Review C
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ÖFOS 2012
103014 Kernphysik
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