On the prompt fission neutron energy distributions

Prompt fission neutron energy spectrum (PFNS) from spontaneous fission of 240Pu (sf) and 242Pu (sf) is calculated and compared quantitatively with the experimentally measured data. Calculations were done with three different methods; the first method is based on neutron's average center of mass kinetic energy, for the second fission fragment excitation energy distribution was used, and for the third method standardization of 252Cf (sf) was preferred. In each method aim is to calculate nuclear temperature parameters of light and heavy fission fragments. The last method has also been used in this thesis to calculate several crucial parameters of some well-known fissile nuclei, such as neutron average center of mass energy, excitation energy and multiplicity. We have shown that all calculations well describes the observed data.