Effect of the entrance channel on the synthesis of superheavy elements

Cross-sections for the synthesis of superheavy elements were analyzed using the concept of a dinuclear system. Experimental values for the production of elements Z = 104, 108, 110, 111 and 112 by cold fusion reactions with ta rgets of Pb-208 and Bi-209 were reproduced. The model reveals the importanc e of entrance channel dynamics and competition between quasi-fission and co mplete fusion processes. Energy windows were observed which allow capture o f the reacting nuclei and formation of the compound nucleus. The quantities were studied which are significant for the interaction dynamics of massive nuclei in the entrance channel.