  We use a phenomenological nucleus-nucleus optical potential constructed in
the light of a potential developed by Ginocchio to study the elastic angular
distributions of different nuclear systems near Coulomb barrier. The
differential cross section ratios of elastic to Rutherford are studied for
systems $^{14}$N+$^{56}$Fe and $^{14}$N+$^{90}$Zr for several colliding
energies. Our theoretical predictions are well competitive with the
experimental data, and the significantly small imaginary part of the potential
explains the elastic scattering cross section and threshold anomaly in both
systems.
