Effects of diabaticity on fusion of heavy nuclei in the dinuclear model ...

Figure 1-3: Shapes <strong>of</strong> the system 110 Pd+ 110 Pd as functions <strong>of</strong> ε and λ.
Motivated by these results, we started to investigate possible factors which hinder the DNS
to melt together in the elongation λ. We consider these factors to be diabatic effects in the
potential energy surface [35] and a large mass parameter in the neck coordinate ε [43]. In-
vestigating these factors, we try to find theoretical justifications for the basic assumptions <strong>of</strong>
the model <strong>of</strong> fusion based on the DNS-concept. We would like to stress that the model <strong>of</strong>
fusion, based on the DNS-concept, explains many experimental data concerning the production
<strong>of</strong> superheavy elements and plays an important role for giving predictions for new experiments
([22],[27]).
In the present work, using the TCSM, we want to study the following:
• Diabatic potentials as a function <strong>of</strong> the relevant collective variables <strong>of</strong> the DNS for heavy-
ion systems.
• Microscopic mass parameters for the relevant coordinates <strong>of</strong> the DNS formed in collisions
<strong>of</strong> heavy nuclei taking the width <strong>of</strong> single-particle states into account.
• Whether the system has time for the growing <strong>of</strong> the neck.
• Whether the system has time for destroying the ”memory” on the diabatic (structural)
forbiddenness for the fusion in the elongation λ and to find the favorable fusion channel.
• Within which model it is possible to describe the experimental quasi-fission products <strong>of</strong>
fusion reactions.
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