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Absolute and relative cross section measurements of 237Np(n,f) and 238U(n,f) at the National Physical Laboratory

Salvador-Castiñeira, P; Hambsch, F-J; Göök, A; Vidali, M; Hawkes, N P; Roberts, N J; Taylor, G C; Thomas, D J (2017) Absolute and relative cross section measurements of 237Np(n,f) and 238U(n,f) at the National Physical Laboratory. EPJ Web of Conferences, 146. 04050 ISSN 2100-014X

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Abstract

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.

Item Type: Article
Subjects: Ionising Radiation > Neutron Metrology
Divisions: Chemical, Medical & Environmental Science
Identification number/DOI: 10.1051/epjconf/201714604050
Last Modified: 12 Jul 2018 14:44
URI: http://eprintspublications.npl.co.uk/id/eprint/8031

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