Effects of Fission Fragments on the Angular Distribution of Scission Neutrons

We investigate the effects of the fission fragments on the angular distribution of scission neutrons. The time evolution of the wave function of the scission neutron is obtained by integrating the time-dependent Schrödinger equation. The effects of the re-absorption and scattering by the fission fragments are taken into account by means of the optical potential. The angular distribution is strongly modified by the presence of the fragments. Dependence on the magnitude of the absorption is discussed. Influence of the finiteness of the grid size is also discussed.