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Measurement of the average energy and multiplicity of prompt-fission neutrons from 238U(n,f) and 237Np(n,f) from 1 to 200 MeV

J. Taieb, T. Granier, T. Ethvignot, M. Devlin, R. C. Haight, R. O. Nelson, J. M. O'Donnell, D. Rochman
2007 ND2007   unpublished

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Taking advantage of the neutron source of the LANCSE, it has been possible to obtain a measure of the velocity distribution and the number of prompt-neutrons emitted in the neutron-induced fission of 238 U and 237 Np over a broad incident neutron energy range. The mean kinetic energy was extracted and is shown as a function of the incident-neutron energy. We confirm here the observation, for both reactions, of a dip around the second-chance fission which is explained by the lower kinetic energy
more » ... of the pre-fission neutrons. Such a observation is reproduced by Los Alamos model as implemented at Bruyères-le-Châtel and by the Maslov model. As far as the neutron multiplicity is concerned, a similar dip is observed.
doi:10.1051/ndata:07676 fatcat:3ui5vyh4tfg7flpbmopaayiyvy
Citation

J. Taieb, T. Granier, T. Ethvignot, M. Devlin, R. C. Haight, R. O. Nelson, J. M. O'Donnell, D. Rochman. "Measurement of the average energy and multiplicity of prompt-fission neutrons from 238U(n,f) and 237Np(n,f) from 1 to 200 MeV." ND2007 (2007)