(color online) Comparison of the calculated differential cross sections using “spe” potential with different values of the parameter d in Eq. (4) with the experimental measurements for elastic scattering of electrons by Ne at incident energies of (a) 5 eV, (b) 10 eV, (c) 20 eV, and Ar at incident energies of (d) 3 eV, (e) 5 eV, (f) 10 eV, respectively. The experimental data are taken from Chao et al.,^[23] Gulley et al.,^[24] Linert et al.,^[25] and Regester and Trajmar^[26] for Ne, and Srivastava et al.,^[27] and Nahar and Wadehra^[16] for Ar.