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FP5

Prompt fission neutron multiplicity and spectra evaluation in the frame of the multi-modal fission model for {237}Np(n,f) and {238}U(n,f)

Project ID: 1994
Funded under: FP5-JRC

Abstract

The multi-modal fission model approach was used for the evaluation of the prompt fission neutron multiplicity and spectra for the neutron induced fission of {237}Np and {238}U. The model parameters are based on experimental data obtained at IRMM. The three most dominant fission modes (standard I, standard II and superlong) are taken into account. For each fission mode the prompt neutron multiplicity and spectrum are calculated within an improved version of the Los Alamos model. The calculated total prompt neutron multiplicity and spectrum are in good agreement with the experimental data. Also, the average prompt gamma ray energy for each fission mode is obtained as well as the total prompt gamma ray energy. The total prompt gamma ray energy for {237}Np(n, f) is in agreement with existing experimental data.

Additional information

Authors: HAMBSCH F-J, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);OBERSTEDT S, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);VLADUCA G, Bucharest University, Faculty of Physics, Bucharest (RO);TUDORA A, Bucharest University, Faculty of Physics, Bucharest (RO)
Bibliographic Reference: An article published in: Nuclear Physics A , Volume 709, Issues 1-4 , (21 October 2002), pp.85-102
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1016/S0375-9474%2802%2901041-2
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