On the search for a (n,f) cross-section reference at intermediate energies
1 Universidade de Santiago de Compostela (USC), Spain
2 Istituto Nazionale di Fisica Nucleare, Bologna, Italy
3 Agenzia Nazionale per le Nuove Tecnologie, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), Bologna, Italy
4 Department of Physics and Astronomy, Uppsala University, Sweden
5 Centre National de la Recherche Scientifique/IN2P3 - IPN-Orsay, France
6 European Commission JRC - IRMM, Geel, Belgium
a e-mail: Ignacio.email@example.com
Published online: 13 September 2017
The (n,f) cross-sections proposed as references by the IAEA for 235U, 238U and 209Bi are compared with a new analysis that combines the measurements performed at CERN-n_TOF of their cross-section ratios with new calculations done using Monte Carlo codes based on phenomenological models INCL+ +, GEMINI+ +, and ABLA07. The calculations are cross-checked with those for the (p,f) reactions, where experimental values are available. We have evaluated in this way the (n,f) cross sections for 238U, 235U and 209Bi, in the intermediate energy region going from 190 MeV to 2 GeV. Our results definitively discard the JENDL/HE-2007 evaluations above 300 MeV, falling inside the confidence corridor proposed by IAEA but for the points around 300–400 MeV where a discrepancy is to be noticed.
© The Authors, published by EDP Sciences, 2017
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