Open Access
Issue
ND 2007
2007
Article Number 103
Number of page(s) 4
Section Fission studies
DOI https://doi.org/10.1051/ndata:07735
Published online 17 June 2008
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07735

New experimental and theoretical results for the 235U fission neutron spectrum

N.V. Kornilov1, F.-J. Hambsch1, I. Fabry1, S. Oberstedt1 and S.P. Simakov2

1  EC-JRC-IRMM, 2440 Geel, Belgium
2  Forschungszentrum Karlsruhe, Institute für Reaktorsicherheit, 76344 Eggenstein-Leopoldshafen, Germany

nikolai.kornilov@ec.europa.eu

Published online: 21 May 2008

Abstract
The prompt fission neutron spectrum (PFNS) was measured at 0.5 MeV incident neutron energy. An angular anisotropy in the prompt neutron emission was found. The neutron yield is ~10% higher and the average energy ~80 keV smaller at 90 degree than at 120 degree neutron emission angle. The spectral difference diminishes with increasing prompt neutron energy. The experimental data were successfully described with the semi-empirical "three sources" model.



© CEA 2008

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