Calculations of energy level and collision strength for Ne-like Ar⁸⁺ ion

By means of a new rapid and accurate fully relativistic distorted wave born approximation and AUTOSTRUCTURE (AS) program , the collision strengths of some highly charged ions are calculated. The 2s²2p⁶, 2s²2p⁵3s, 2s²2p⁵3p, 2s²2p⁵3d, 2s²p⁶3s, 2s²p⁶3p, 2s²p⁶3d configurations of Ne-like Ar⁸⁺ ion are mainly studied. Their energy levels and collision strengths from j to i states are calculated when the collision energies are 75.0, 125.0, 175.0 and 250.0 (Ry). The calculated results are compared with the experimental data. It is found that the fully relativistic distorted wave born approximation and AUTOSTRUCTURE (AS) program provide the good and effective way for studying the electron-impact excitations of complex atoms or ions. (authors)