EVIDENCE FOR TRANSIENT EFFECTS IN FISSION

摘要

The aim of this work is to experimentally investigate transient effects in fission. In order to simplify the theoretical description, we have chosen peripheral heavy-ion collisions at relativistic energies to reduce the side effects and to produce highly excited fissioning systems with well-defined initial properties. Thanks to an experimental setup specially conceived for fission studies in inverse kinematics, we could determine two new observables very sensitive to transient effects in fission. Quantitative values for transient effects are deduced from the comparison of these observables with a nuclear-reaction code where dissipation effects in fission are modeled in a highly realistic way.