Potential parameters extracted from the minimum χ2/N-fit to the measured data and corresponding χ2/N-value in the eikonal model analysis using the tangential velocity at rc for 386 MeV α-particle elastic scatterings from ³²S and ⁵⁸Ni. σR in the last column is the reaction cross section obtained using the partial wave sum given by Eq. (10). Values in parentheses are the results obtained using the asymptotic velocity. χ2/N-values were obtained under the assumption that all experimental data have a 10% error.