Predictions of characteristics of prompt-fission γ-ray spectra from the n+238U reaction up to En=20 MeV

Systematics from 2001, describing prompt-fission gamma-ray spectra (PFGS) characteristics as a function of mass and atomic number of the fissioning system, was revisited and parameters were revised, based on recent experimental results. Although originally expressed for spontaneous and thermal-neutron induced fission, validity for fast neutrons was assumed and applied to predict PFGS characteristics for the reaction n + U-238 up to incident neutron energies of E-n = 20 MeV. The results from this work are in good agreement with corresponding results from both model calculations and experiments.