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

Paradela, C. and Calviani, M. and Tarr`io, D. and Leal-Cidoncha, E. and Leong, L. S. and Tassan-Got, L. and Le Naour, C. and Duran, I. and Colonna, N. and Audouin, L. and Mastromarco, M. and Lo Meo, S. and Ventura, A. and Aerts, G. and Altstadt, S. and Álvarez, H. and Álvarez-Velarde, F. and Andriamonje, S. and Andrzejewski, J. and Badurek, G. and Barbagallo, M. and Baumann, P. and Bécares, V. and Bev cváv r, F. and Belloni, F. and Berthier, B. and Berthoumieux, E. and Billowes, J. and Boccone, V. and Bosnar, D. and Brugger, M. and Calviño, F. and Cano-Ott, D. and Capote, R. and Carrapic co, C. and Cennini, P. and Cerutti, F. and Chiaveri, E. and Chin, M. and Cortés, G. and Cortés-Giraldo, M. A. and Cosentino, L. and Couture, A. and Cox, J. and David, S. and Diakaki, M. and Dillmann, I. and Domingo-Pardo, C. and Dressler, R. and Dridi, W. and Eleftheriadis, C. and Embid-Segura, M. and Ferrant, L. and Ferrari, A. and Finocchiaro, P. and Fraval, K. and Fujii, K. and Furman, W. and Ganesan, S. and Garc`ia, A. R. and Giubrone, G. and Gómez-Hornillos, M. B. and Gonc calves, I. F. and González-Romero, E. and Goverdovski, A. and Gramegna, F. and Griesmayer, E. and Guerrero, C. and Gunsing, F. and Gurusamy, P. and Haight, R. and Heil, M. and Heinitz, S. and Igashira, M. and Isaev, S. and Jenkins, D. G. and Jericha, E. and Kadi, Y. and Käppeler, F. and Karadimos, D. and Karamanis, D. and Kerveno, M. and Ketlerov, V. and Kivel, N. and Kokkoris, M. and Konovalov, V. and Krtiv cka, M. and Kroll, J. and Lampoudis, C. and Langer, C. and Lederer, C. and Leeb, H. and Losito, R. and Lozano, M. and Manousos, A. and Marganiec, J. and Mart`inez, T. and Marrone, S. and Massimi, C. and Mastinu, P. and Mendoza, E. and Mengoni, A. and Milazzo, P. M. and Mingrone, F. and Mirea, M. and Mondelaers, W. and Moreau, C. and Mosconi, M. and Musumarra, A. and O`Brien, S. and Pancin, J. and Patronis, N. and Pavlik, A. and Pavlopoulos, P. and Perkowski, J. and Perrot, L. and Pigni, M. T. and Plag, R. and Plompen, A. and Plukis, L. and Poch, A. and Pretel, C. and Praena, J. and Quesada, J. and Rauscher, T. and Reifarth, R. and Riego, A. and Roman, F. and Rudolf, G. and Rubbia, C. and Rullhusen, P. and Salgado, J. and Santos, C. and Sarchiapone, L. and Sarmento, R. and Saxena, A. and Schillebeeckx, P. and Schmidt, S. and Schumann, D. and Stephan, C. and Tagliente, G. and Tain, J. L. and Tavora, L. and Terlizzi, R. and Tsinganis, A. and Valenta, S. and Vannini, G. and Variale, V. and Vaz, P. and Versaci, R. and Vermeulen, M. J. and Villamarin, D. and Vincente, M. C. and Vlachoudis, V. and Vlastou, R. and Voss, F. and Wallner, A. and Walter, S. and Ware, T. and Weigand, M. and Weiß, C. and Wiesher, M. and Wisshak, K. and Wright, T. and v Zugec, P.. (2015) High-accuracy determination of the U-238/U-235 fission cross section ratio up to approximate to 1 GeV at n_TOF at CERN. Physical Review C (PRC), 91 (2). 024602.

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The U 238 to U 235 fission cross section ratio has been determined at n_TOF up 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 ≈1 GeV.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:02
Deposited On:19 May 2016 07:19

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