Speaker
Description
The total kinetic energy (TKE) of fission fragments is accounting for about 80 to 90 % of the Q-value in nuclear fission. Therefore, it is important to understand the characteristics of TKE from the perspective of nuclear energy utilization and basic research, e.g., number of fission in reactor power or local heating of the r-process site including fission recycling. Naively thinking, the TKE is expected to increase, when the excitation energy of the fissioning system increases. In the reality, however, the TKE decreases as the excitation energy increases as is shown by many data on neutron-induced nuclear fission. Our 4-dimensional Langevin model has elucidated this mystery. TKE and the fission fragment deformation are related, the excitation energy dependence of TKE decreasing is discussed.