Potential barrier in the problem of the evolution of a dinuclear system

A method for calculating the potential energy of a dinuclear system evolving along the charge-asymmetry coordinate is analyzed. It is shown that the shape of the potential is determined primarily by the dependence of the proton separation energy on the mass and the charge number of nuclei that form the dinuclear system and by the concerted effect of the Coulomb fields of these nuclei on the single-particle motion of constituent nucleons.