Publikationen

High-accuracy determination of the U-238/U-235 fission cross section ratio up to approximate to 1 GeV at n_TOF at CERN

Autor(en)
C. Paradela, M. Calviani, D. Tarrio, E. Leal-Cidoncha, L. S. Leong, L. Tassan-Got, C. Le Naour, I. Duran, N. Colonna, L. Audouin, M. Mastromarco, S. Lo Meo, A. Ventura, G. Aerts, S. Altstadt, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, G. Badurek, M. Barbagallo, P. Baumann, V. Becares, F. Becvar, F. Belloni, B. Berthier, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, F. Calvino, D. Cano-Ott, R. Capote, C. Carrapico, P. Cennini, F. Cerutti, E. Chiaveri, M. Chin, G. Cortes, M. A. Cortes-Giraldo, L. Cosentino, A. Couture, J. Cox, S. David, M. Diakaki, I. Dillmann, C. Domingo-Pardo, R. Dressler, W. Dridi, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, P. Finocchiaro, K. Fraval, K. Fujii, W. Furman, S. Ganesan, A. R. Garcia, G. Giubrone, M. B. Gomez-Hornillos, I. F. Goncalves, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, P. Gurusamy, R. Haight, M. Heil, S. Heinitz, M. Igashira, S. Isaev, D. G. Jenkins, E. Jericha, Y. Kadi, F. Kaeppeler, D. Karadimos, D. Karamanis, M. Kerveno, V. Ketlerov, N. Kivel, M. Kokkoris, V. Konovalov, M. Krticka, J. Kroll, C. Lampoudis, C. Langer, C. Lederer, H. Leeb, R. Losito, M. Lozano, A. Manousos, J. Marganiec, T. Martinez, S. Marrone, C. Massimi, P. Mastinu, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, C. Moreau, M. Mosconi, A. Musumarra, S. O'Brien, J. Pancin, N. Patronis, A. Pavlik, P. Pavlopoulos, J. Perkowski, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, L. Plukis, A. Poch, C. Pretel, J. Praena, J. Quesada, T. Rauscher, R. Reifarth, A. Riego, F. Roman, G. Rudolf, C. Rubbia, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, C. Stephan, G. Tagliente, J. L. Tain, L. Tavora, R. Terlizzi, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, R. Versaci, M. J. Vermeulen, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, A. Wallner, S. Walter, T. Ware, M. Weigand, C. Weiss, M. Wiesher, K. Wisshak, T. Wright, P. Zugec
Abstrakt

The U-238 to U-235 fission cross section ratio has been determined at n_TOF up to approximate to 1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. They are all consistent to each other within the relative systematic uncertainty of 3-4%. The data collected at n_TOF have been suitably combined to yield a unique fission cross section ratio as a function of neutron energy. The result confirms current evaluations up to 200 MeV. Good agreement is also observed with theoretical calculations based on the INCL++ /Gemini++ combination up to the highest measured energy. The n_TOF results may help solve a long-standing discrepancy between the two most important experimental datasets available so far above 20 MeV, while extending the neutron energy range for the first time up to approximate to 1 GeV.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
Universidade de Santiago de Compostela (USC), Institute for Reference Materials and Measurements, European Organization for Nuclear Research (CERN), Centre National De La Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare, Roma, Università degli Studi di Salerno, French Atomic Energy Commission (CEA), Johann Wolfgang Goethe-Universität Frankfurt am Main, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, University of Lodz, Technische Universität Wien, National Institute of Nuclear & Particle Physics (CNRS) IN2P3, IReS, Charles University Prague, University of Manchester, University of Zagreb, Universidad Politécnica de Madrid, International Atomic Energy Agency (IAEA), Universitat Politècnica de Catalunya, Universidad de Sevilla, University of Notre Dame, National Technical University of Athens (NTUA), Karlsruher Institut für Technologie, Instituto de Física Corpuscular (IFIC), Paul Scherrer Institute, Aristotle University of Thessaloniki, Joint Institute for Nuclear Research, Bhabha Atom Res Ctr, Bhabha Atomic Research Center, Institute of Physics and Power Engineering (IPPE), Los Alamos National Laboratory, Tokyo Institute of Technology (TIT), University of York, University of Ioannina, Università degli Studi di Bologna, Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN HH), Università degli Studi di Catania, University of Hertfordshire, Universität Basel, Uppsala University, Japan Atomic Energy Agency, Universidade de Lisboa, Australian National University
Journal
Physical Review C
Band
91
Anzahl der Seiten
11
ISSN
0556-2813
DOI
https://doi.org/10.1103/PhysRevC.91.024602
Publikationsdatum
02-2015
Peer-reviewed
Ja
ÖFOS 2012
103014 Kernphysik
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/highaccuracy-determination-of-the-u238u235-fission-cross-section-ratio-up-to-approximate-to-1-gev-at-ntof-at-cern(dec83dd9-deb3-4677-9897-9325d7c04ce1).html