Abstract
Using semiclassical perturbation approach in impact approximation, Stark shifts for singly charged argon (Ar II) spectral lines have been calculated. Energy levels and oscillator strengths needed for this calculation were determined using Hartree-Fock method with relativistic correction (HFR). We compare our results with experimental values for 100 spectral lines. We also present results as a function of temperature for 161 spectral lines for collisions with electrons, protons, singly charged helium and singly charged argon. This work extends our previous one.