Influence of entrance channel on production cross sections of superheavy nuclei

The dependence of the evaporation residue cross section (ERCS) to produce superheavy nuclei (SHN) on the entrance channel of colliding nuclei is analyzed within the dinuclear system concept. The ERCS for the hot fusion reactions are investigated systematically and compared with existing experimental data. The capture cross section depends sensitively on the reaction Q value. The fusion probabilities and surviving probabilities depend sensitively on the neutron numbers of the target and projectile nuclei. In most cases more neutron excess in the system can increase the producing cross section of SHN.