Dissipation during saddle to scission motion in fission

Damping influences observables such as total kinetic energy and excitation energies of the fragments, broadening of fission fragment mass yields, thermal generation of angular momentum in the fragments, and near scission particle emission. We have reported recently experimental results on these topics and supplementary new results are reported in the present symposium. In the formation of super heavy elements, the heavy ion reactions face the damping of bombarding energy. If the damping is very strong at an early stage or midway of the reaction, too much energy will go into heat and too little to collective motion. There will be no collective drive left to put the reaction system to the fusion pocket in this case. So, the nature of dissipation discussed in the present work, though it is time reversed for heavy ion reaction to be quite critical for super heavy element research