Statistical and dynamical aspects of nuclear fission

In the analysis of pre-fission neutron multiplicity, long life time fission component and fission probability, the behaviours of essential parameters characterizing fission dynamics, i.e., the friction parameter γ/2ω0, the critical temperature for healing of shell and pairing correction Tc, the transient time parameter tc and the level density parameter af/an are discussed in the frame of a modified statistical model. It is found that the critical temperature Tc affects significantly the experimental observables and is crucial especially for the estimation of evaporation residue cross section in competition with fission process, i.e., sensitive for the synthesis of super heavy elements. (authors). 33 refs., 9 figs