International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07750

Measurement of neutron induced fission of ²³⁵U, ²³³U and ²⁴⁵Cm with the FIC detector at the CERN n_TOF facility

Marco Calviani^{1, 2}, Dimitrios Karadimos³, U. Abbondanno⁴, G. Aerts⁵, H. Álvarez⁶, F. Álvarez-Velarde⁷, S. Andriamonje⁵, J. Andrzejewski⁸, P. Assimakopoulos³, L. Audouin⁹, G. Badurek¹⁰, P. Baumann¹¹, F. Becvár¹², E. Berthoumieux⁵, F. Calviño¹³, D. Cano-Ott⁷, R. Capote^{14, 15}, C. Carrapiço^{16, 5}, P. Cennini¹⁷, V. Chepel¹⁸, E. Chiaveri¹⁷, N. Colonna¹⁹, G. Cortes²⁰, A. Couture²¹, J. Cox²¹, M. Dahlfors¹⁷, S. David⁹, I. Dillmann²², C. Domingo-Pardo^{23, 22}, W. Dridi⁵, I. Duran⁶, C. Eleftheriadis²⁴, M. Embid-Segura⁷, L. Ferrant⁹, A. Ferrari¹⁷, R. Ferreira-Marques¹⁸, K. Fujii⁴, W. Furman²⁵, I. Goncalves¹⁸, E. González-Romero⁷, F. Gramegna¹, C. Guerrero⁷, F. Gunsing⁵, B. Haas²⁶, R. Haight²⁷, M. Heil²², A. Herrera-Martinez¹⁷, M. Igashira²⁸, E. Jericha¹⁰, F. Käppeler²², Y. Kadi¹⁷, D. Karamanis³, M. Kerveno¹¹, P. Koehler²⁹, E. Kossionides³⁰, M. Krticka¹², C. Lampoudis^{24, 5}, H. Leeb¹⁰, A. Lindote¹⁸, I. Lopes¹⁸, M. Lozano¹⁵, S. Lukic¹¹, J. Marganiec⁸, S. Marrone¹⁹, T. Martínez⁷, C. Massimi³¹, P. Mastinu¹, A. Mengoni^{14, 17}, P.M. Milazzo⁴, C. Moreau⁴, M. Mosconi²², F. Neves¹⁸, H. Oberhummer¹⁰, S. O'Brien²¹, J. Pancin⁵, C. Papachristodoulou³, C. Papadopoulos³², C. Paradela⁶, N. Patronis³, A. Pavlik³³, P. Pavlopoulos³⁴, L. Perrot⁵, M.T. Pigni¹⁰, R. Plag²², A. Plompen³⁵, A. Plukis⁵, A. Poch²⁰, J. Praena¹, C. Pretel²⁰, J. Quesada¹⁵, T. Rauscher³⁶, R. Reifarth²⁷, C. Rubbia³⁷, G. Rudolf¹¹, P. Rullhusen³⁶, J. Salgado¹⁶, C. Santos¹⁶, L. Sarchiapone¹⁷, I. Savvidis²⁴, C. Stephan⁹, G. Tagliente¹⁹, J.L. Tain²³, L. Tassan-Got⁹, L. Tavora¹⁶, R. Terlizzi¹⁹, G. Vannini³¹, P. Vaz¹⁶, A. Ventura³⁸, D. Villamarin⁷, M.C. Vincente⁷, V. Vlachoudis¹⁷, R. Vlastou³², F. Voss²², S. Walter²², M. Wiescher²¹ and K. Wisshak<sup>22

1</sup>  Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Italy
²  Dipartimento di Fisica, Università di Padova, Italy
³  University of Ioannina, Greece
⁴  Istituto Nazionale di Fisica Nucleare, Trieste, Italy
⁵  CEA/Saclay-DSM/DAPNIA, Gif-sur-Yvette, France
⁶  Universidade de Santiago de Compostela, Spain
⁷  Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, Madrid, Spain
⁸  University of Lodz, Lodz, Poland
⁹  Centre National de la Recherche Scientifique/IN2P3-IPN, Orsay, France
¹⁰  Atominstitut der Österreichischen Universitäten, Technische Universität Wien, Austria
¹¹  Centre National de la Recherche Scientifique/IN2P3-IReS, Strasbourg, France
¹²  Charles University, Prague, Czech Republic
¹³  Universidad Politecnica de Madrid, Spain
¹⁴  International Atomic Energy Agency (IAEA), Nuclear Data Section, Vienna, Austria
¹⁵  Universidad de Sevilla, Spain
¹⁶  Instituto Tecnológico e Nuclear (ITN), Lisbon, Portugal
¹⁷  CERN, Geneva, Switzerland
¹⁸  LIP-Coimbra & Departamento de Fisica da Universidade de Coimbra, Portugal
¹⁹  Istituto Nazionale di Fisica Nucleare, Bari, Italy
²⁰  Universitat Politecnica de Catalunya, Barcelona, Spain
²¹  University of Notre Dame, Notre Dame, USA
²²  Forschungszentrum Karlsruhe GmbH (FZK), Institut für Kernphysik, Germany
²³  Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Spain
²⁴  Aristotle University of Thessaloniki, Greece
²⁵  Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna, Russia
²⁶  Centre National de la Recherche Scientifique/IN2P3-CENBG, Bordeaux, France
²⁷  Los Alamos National Laboratory, New Mexico, USA
²⁸  Tokyo Institute of Technology, Tokyo, Japan
²⁹  Oak Ridge National Laboratory, Physics Division, Oak Ridge, USA
³⁰  NCSR, Athens, Greece
³¹  Dipartimento di Fisica, Università di Bologna, and Sezione INFN di Bologna, Italy
³²  National Technical University of Athens, Greece
³³  Institut für Isotopenforschung und Kernphysik, Universität Wien, Austria
³⁴  Pole Universitaire Léonard de Vinci, Paris-La Défense, France
³⁵  CEC-JRC-IRMM, Geel, Belgium
³⁶  Department of Physics-University of Basel, Switzerland
³⁷  Università degli Studi Pavia, Pavia, Italy
³⁸  ENEA, Bologna, Italy

marco.calviani@lnl.infn.it

Published online: 21 May 2008

Abstract
A series of measurements of neutron induced fission cross section of various TRU isotopes have been performed at the CERN n_TOF spallation neutron facility, in the energy range from thermal to nearly 250 MeV. The experimental apparatus consists in a fast ionization chamber (FIC), used as a fission fragment detector with a high efficiency. Good discrimination between alphas and fission fragments can be obtained with a simple amplitude threshold. In order to allow the monitoring of the neutron beam and to extract the n_TOF neutron flux, the well known cross section of the ²³⁵U(n,f) reaction, considered as a fission standard, has been used. Preliminary results for the cross section are shown for some selected isotopes such as ²³⁵U, ²³³U and ²⁴⁵Cm in the energy range from 0.050 eV to about 2 MeV.

© CEA 2008