Neutron-induced fission cross-section of 233U in the energy range 0.5 < En < 20 MeV

F. Belloni , M. Calviani , N. Colonna , P. Mastinu , P.M. Milazzo , U. Abbondanno , G. Aerts (1) , H. Alvarez , F. Alvarez-Velarde , S. Andriamonje (1) , J. Andrzejewski , L. Audouin , G. Badurek , P. Baumann (2) , F. Becvar , E. Berthoumieux (1) , F. Calvino , D. Cano-Ott , R. Capote , C. Carrapico , P. Cennini , V. Chepel , E. Chiaveri , G. Cortes , A. Couture , J. Cox , M. Dahlfors , S. David (2) , I. Dillmann , C. Domingo-Pardo , W. Dridi (1) , I. Duran , C. Eleftheriadis , M. Embid-Segura , Anthony Ferrari , R. Ferreira-Marques , K. Fujii , W. Furman , I. Goncalves , E. Gonzalez-Romero , A. Goverdovski , F. Gramegna , C. Guerrero , F. Gunsing (1) , B. Haas (3) , R. Haight , M. Heil , A. Herrera-Martinez , M. Igashira , E. Jericha , F. Kappeler , Y. Kadi , D. Karadimos , D. Karamanis (3) , M. Kerveno (2) , P. Koehler , E. Kossionides , M. Krticka , C. Lamboudis , H. Leeb , A. Lindote , I. Lopes , M. Lozano , S. Lukic (2) , J. Marganiec , S. Marrone , T. Martinez , C. Massimi , M.H. Meaze , A. Mengoni , C. Moreau , M. Mosconi , F. Neves , H. Oberhummer , S. O'Brien , J. Pancin (1) , C. Papachristodoulou , C. Papadopoulos , C. Paradela , N. Patronis , A. Pavlik , P. Pavlopoulos (4) , L. Perrot (1) , M.T. Pigni , R. Plag , A. Plompen , A. Plukis (1) , A. Poch , J. Praena , C. Pretel , J. Quesada , T. Rauscher , R. Reifarth , M. Rosetti , C. Rubbia , G. Rudolf (2) , P. Rullhusen , J. Salgado , C. Santos , L. Sarchiapone , I. Savvidis , C. Stephan (5) , G. Tagliente , J.L. Tain , L. Tassan-Got (5) , L. Tavora , R. Terlizzi , G. Vannini , P. Vaz , A. Ventura , D. Villamarin , M.C. Vincente , V. Vlachoudis , R. Vlastou , F. Voss , S. Walter , M. Wiescher , K. Wisshak

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 DRS-IPHC - Département Recherches Subatomiques
3 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
4 Pôle Universitaire Léonard de Vinci
5 IPNO - Institut de Physique Nucléaire d'Orsay

The neutron-induced fission cross-section of 233U has been measured at the CERN n TOF facility relative to the standard fission cross-section of 235U between 0.5 and 20MeV. The experiment was performed with a fast ionization chamber for the detection of the fission fragments and to discriminate against α-particles from the natural radioactivity of the samples. The high instantaneous flux and the low background of the n TOF facility result in data with uncertainties of ≈ 3%, which were found in good agreement with previous experiments. The high quality of the present results allows to improve the evaluation of the 233U(n,f) cross-section and, consequently, the design of energy systems based on the Th/U cycle.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

F. Belloni, M. Calviani, N. Colonna, P. Mastinu, P.M. Milazzo, et al.. Neutron-induced fission cross-section of 233U in the energy range 0.5 < En < 20 MeV. European Physical Journal A, 2011, 47, pp.2. ⟨10.1140/epja/i2011-11002-y⟩. ⟨in2p3-00587730⟩