AVERAGE ENERGY OF ~(237)Np AND ~(241)Am PROMPT FISSION NEUTRON SPECTRA

摘要

The use of ~(237)Np in nuclear reactors or electronuclear facilities requires substantially more accurate neutron data for this nucleus, especially, more accurate spectra and average energy of the prompt fission neutrons. Experimental spectra of prompt fission neutrons for the reaction ~(237)Np(n, f) are available only for a limited set of incident-neutron energies [1-4] (Fig. 1). The theoretical methods used for analyzing and predicting such spectra [5,6] cannot present a consistent and detailed estimate of the dependence of the prompt-neutron spectra on incident-neutron energy in the range E_n = 0.5-20 MeV.