Absolute and relative cross section measurements of 237Np(n,f) and 238U(n,f) at the National Physical Laboratory
1 National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
2 EC-JRC-Directorate G-Nuclear Safety & Security, Unit G.2, Retieseweg 111, 2440 Geel, Belgium
a e-mail: email@example.com
Published online: 13 September 2017
Cross section measurements in the fast energy region are being demanded as one of the key ingredients for modelling Generation-IV nuclear power plants. However, in facilities where there are no time-of-flight possibilities or it is not convenient to use them, using the 235U(n,f) cross section as a benchmark would require a careful knowledge of the room scatter in the experimental area. In this paper we present measurements of two threshold reactions, 238U(n,f) and 237Np(n,f), that could become a standard between their fission threshold and 2.5 MeV, if the discrepancies shown in the evaluations and in some experimental data can be solved. The preliminary results are in agreement with the present ENDF/B-VII.1 evaluation.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.