The mechanisms of the complete, incomplete and quasifission processes in heavy ion collisions

The realistic estimation of the optimal collision energies at synthesis of the new superheavy elements can be done on the basis of the knowledge about reaction channels occurring in heavy ion collisions. The compound nucleus formed in the complete fusion of colliding nuclei can be observed as a new superheavy element if it survives against fission into two parts. The application of the dinuclear system model developed by the theoretical group of the Nuclear Physics of Academy of Science of Uzbekistan to describe experimental data obtained in the collisions of massive nuclei shows that probability of complete fusion strongly decreases due to increase of the incomplete and quasifission processes. The competition between these three processes strongly depends on the mass asymmetry of colliding nuclei, energy and orbital angular momentum of collision.