Abstract
The application of the Point-by-Point treatment to numerous fission cases (i.e. 74 cases including many actinides fissioning spontaneously or induced by thermal neutrons and fast neutrons with energies up to the threshold of the second chance fission) has emphasized interesting systematic behaviors of different quantities characterizing the fission fragments. Such systematics can provide values of the input parameters for a new version of the Los Alamos (LA) model including the sequential emission of prompt neutrons, which was recently developed and validated. The prompt neutron spectrum results based on the systematics of input parameters are obtained in good agreement with the experimental data of many actinides. The LA model with sequential emission together with the proposed systematics of its input parameters can predict prompt neutron spectra of fissioning nuclei without any experimental information, thus it becomes an useful tool for prompt neutron spectrum evaluations.
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