Coulomb Potentials between Spherical and Deformed Nuclei

Coulomb potentials for spherical-deformed reaction partners are calculated in terms of the double folding model as well as the conventional formulas. Our results show that the Coulomb potentials calculated with different approaches have quite different behaviours in the internal region of the potential. Because fusion process is sensitive to the barrier height and the internal part of the potential, the fusion excitation function, especially the fusion barrier distribution, should provide a strict test of the interaction
potentials. Therefore, we calculate the fusion excitation function and barrier distribution for the ¹⁶O+¹⁵⁴Sm system with different versions of the Coulomb potentials, in comparison with the experimental results. It is found that the fusion excitation function and barrier distribution of ¹⁶O+¹⁵⁴Sm are obviously different for the different versions of the Coulomb potentials. By means of this
comparison, we may conclude that the double folding model with the accurate approximate form can provide rather reasonable Coulomb potentials.