International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07510

The ²³⁴U neutron capture cross section measurement at the n_TOF facility

C. Lampoudis^{1, 2}, U. Abbondanno³, G. Aerts², H. Álvarez⁴, F. Álvarez-Velarde⁵, S. Andriamonje², J. Andrzejewski⁶, P. Assimakopoulos⁷, L. Audouin⁸, G. Badurek⁹, P. Baumann¹⁰, F. Becvár¹¹, E. Berthoumieux², F. Calviño¹², M. Calviani^{13, 14}, D. Cano-Ott⁵, R. Capote^{15, 16}, C. Carrapiço^{2, 17}, P. Cennini¹⁸, V. Chepel¹⁹, E. Chiaveri¹⁸, N. Colonna²⁰, G. Cortes²¹, A. Couture²², J. Cox²², M. Dahlfors¹⁸, S. David⁸, I. Dillmann²³, C. Domingo-Pardo^{23, 24}, W. Dridi², I. Duran⁴, C. Eleftheriadis¹, M. Embid-Segura⁵, L. Ferrant⁸, A. Ferrari¹⁸, R. Ferreira-Marques¹⁹, K. Fujii³, W. Furman²⁵, I. Goncalves¹⁹, E. González-Romero⁵, F. Gramegna¹³, C. Guerrero⁵, F. Gunsing², B. Haas²⁶, R. Haight²⁷, M. Heil²³, A. Herrera-Martinez¹⁸, M. Igashira²⁸, E. Jericha⁹, F. Käppeler²³, Y. Kadi¹⁸, D. Karadimos⁷, D. Karamanis⁷, M. Kerveno¹⁰, P. Koehler²⁹, E. Kossionides³⁰, M. Krticka¹¹, H. Leeb⁹, A. Lindote¹⁹, I. Lopes¹⁹, M. Lozano¹⁶, S. Lukic¹⁰, J. Marganiec⁶, S. Marrone²⁰, T. Martínez⁵, C. Massimi³¹, P. Mastinu¹³, A. Mengoni^{15, 18}, P.M. Milazzo³, C. Moreau³, M. Mosconi²³, F. Neves¹⁹, H. Oberhummer⁹, S. O'Brien²², J. Pancin², C. Papachristodoulou⁷, C. Papadopoulos³², C. Paradela⁴, N. Patronis⁷, A. Pavlik³³, P. Pavlopoulos³⁴, L. Perrot², M.T. Pigni⁹, R. Plag²³, A. Plompen³⁵, A. Plukis², A. Poch²¹, J. Praena¹³, C. Pretel²¹, J. Quesada¹⁶, T. Rauscher³⁶, R. Reifarth²⁷, C. Rubbia³⁷, G. Rudolf¹⁰, P. Rullhusen³⁵, J. Salgado¹⁷, C. Santos¹⁷, L. Sarchiapone¹⁸, I. Savvidis¹, C. Stephan⁸, G. Tagliente²⁰, J.L. Tain³⁸, L. Tassan-Got⁸, L. Tavora¹⁷, R. Terlizzi²⁰, G. Vannini³¹, P. Vaz¹⁷, A. Ventura³⁹, D. Villamarin⁵, M.C. Vincente⁵, V. Vlachoudis¹⁸, R. Vlastou³², F. Voss²³, S. Walter²³, M. Wiescher²² and K. Wisshak<sup>23

1</sup>  Aristotle University of Thessaloniki, Greece
²  CEA/Saclay-DSM/DAPNIA, Gif-sur-Yvette, France
³  Istituto Nazionale di Fisica Nucleare, Trieste, Italy
⁴  Universidade de Santiago de Compostela, Spain
⁵  Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, Madrid, Spain
⁶  University of Lodz, Lodz, Poland
⁷  University of Ioannina, Greece
⁸  Centre National de la Recherche Scientifique/IN2P3-IPN, Orsay, France
⁹  Atominstitut der Österreichischen Universitäten, Technische Universität Wien, Austria
¹⁰  Centre National de la Recherche Scientifique/IN2P3-IReS, Strasbourg, France
¹¹  Charles University, Prague, Czech Republic
¹²  Universidad Politecnica de Madrid, Spain
¹³  Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Italy
¹⁴  Dipartimento di Fisica, Università di Padova, Italy
¹⁵  International Atomic Energy Agency (IAEA), Nuclear Data Section, Vienna, Austria
¹⁶  Universidad de Sevilla, Spain
¹⁷  Instituto Tecnológico e Nuclear (ITN), Lisbon, Portugal
¹⁸  CERN, Geneva, Switzerland
¹⁹  LIP-Coimbra & Departamento de Fisica da Universidade de Coimbra, Portugal
²⁰  Istituto Nazionale di Fisica Nucleare, Bari, Italy
²¹  Universitat Politecnica de Catalunya, Barcelona, Spain
²²  University of Notre Dame, Notre Dame, USA
²³  Forschungszentrum Karlsruhe GmbH (FZK), Institut für Kernphysik, Germany
²⁴  Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Spain
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  Pôle 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  Instituto de F´isica Corpuscular, CSIC-Universidad de Valencia, Spain
³⁹  ENEA, Bologna, Italy

christos.lampoudis@cern.ch

Published online: 21 May 2008

Abstract
The neutron capture cross-section of ²³⁴U has been measured for energies from thermal up to the keV region in the neutron time-of-flight facility n_TOF, based on a spallation source located at CERN. A 4π BaF₂ array composed of 40 crystals, placed at a distance of 184.9 m from the neutron source, was employed as a total absorption calorimeter (TAC) for detection of the prompt γ-ray cascade from capture events in the sample. This text describes the experimental setup, all necessary steps followed during the data analysis procedure. Results are presented in the form of R-matrix resonance parameters from fits with the SAMMY code and compared to the evaluated data of ENDF in the relevant energy region, indicating the good performance of the n_TOF facility and the TAC.

© CEA 2008