Atomic structure and Stark width calculation for Cl III ion

In this work, we calculated Stark broadening widths of several doubly-ionized chlorine Cl III spectral lines using the modified semi-empirical approach. The theoretical values of Stark widths are calculated using term energies and oscillator strengths of Cl III from the AUTOSTRUCTURE atomic structure code. We compared the calculated Stark widths with available data from the literature. If we need to interpolate these Stark widths at different temperatures for the studied transitions of Cl III, we use a simple and accurate fitting formula based on a least-squares fitting method.