Energy-dependent characteristics of prompt neutron anisotropic emission by 244Cm and 240Pu according to Monte Carlo simulations

It is well known that prompt neutrons from nuclear fissions show anisotropic emission properties that have been studied for nuclear safeguards purposes. However, for further practical applications, thorough investigation of those properties from diverse perspectives needs to be done. In the present work, the energy dependency of prompt neutron anisotropic emissions by 244Cm and 240Pu was investigated using Monte Carlo simulations. In the results, the asymmetry of prompt neutron angular distributions showed a dependency on neutron energy thresholds, and its characteristic tendency was confirmed for both nuclides.