Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for 233U(nth,f)

摘要: Fission yields are essential for nuclear reactor studies (decay heat, fuel inventory…) and constitute also one of the main observables needed to improve our understanding fission process. The symmetric mass region is particular interest due various intriguing properties fragments already reported in literature : inversion charge polarization, large width fragment kinetic energy distribution, strong change prompt neutron multiplicity, etc. Recently, measurements distributions were achieved at LOHENGRIN spectrometer Institut Laue-Langevin (ILL). This experimental work challenging low counting rate appearance contaminant masses, leading pronounced components distribution. Despite removing undesirable contributions, still show two components, indicating that process could be modal. To go further better characterize these a comparison between data Monte Carlo calculations (FIFRELIN code) simulating de-excitation different channels will presented discussed.