  When modeling nuclear processes which occur in heavy-ion reactions, it is
necessary to calculate the potential energy of interaction between two nuclei.
One of the main features determining the dynamics of the nucleus-nucleus
collision is the Coulomb barrier, the knowledge of which is especially
important when low- and intermediate-energy reactions are being studied. Our
goal is to establish a parameterization of nucleon density distributions for
calculation of the nucleus-nucleus double-folding potential in nuclear
reactions. Special attention is paid to the description of the Coulomb barrier.
The study analyzes experimental data on charge radii, diffuseness, and neutron
skin thickness of atomic nuclei. The nucleus-nucleus potential is calculated in
the framework of the double-folding method with the effective nucleon-nucleon
interaction taken in the form of the zero-range Migdal potential. Based on this
analysis and comparison with the Bass potential, parameters of nucleon density
distributions are fitted to reproduce the Coulomb barrier. A method for
correcting the parameters of nucleon densities to reproduce the Coulomb barrier
with the double-folding potential is proposed. The presented way to correct
nucleon densities allows obtaining a satisfactory description of the Coulomb
barrier that is important for modeling near-barrier collisions of heavy ions.
