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We use a phenomenological nucleus-nucleus optical potential constructed inthe light of a potential developed by Ginocchio to study the elastic angulardistributions of different nuclear systems near Coulomb barrier. Thedifferential cross section ratios of elastic to Rutherford are studied forsystems $^{14}$N+$^{56}$Fe and $^{14}$N+$^{90}$Zr for several collidingenergies. Our theoretical predictions are well competitive with theexperimental data, and the significantly small imaginary part of the potentialexplains the elastic scattering cross section and threshold anomaly in bothsystems.

Study of threshold anomaly in elastic scattering of $^{14}$N by $^{56}$Fe and $^{90}$Zr