The study of atomic structure parameters of n = 2-n = 3 for Cl XII ion

This study utilized the multiconfiguration Dirac-Hartree-Fock (MCDHF) method to compute transition wavelengths among the 2s22p2, 2s22p3s, 2s22p3d, 2s2p23p configurations of the carbon-like Cl ion, as the same time, the transition rates, weighted oscillator strengths, and line strengths for these transitions are investigated. Comparison with experimental and theoretical results demonstrated favorable agreement, validating the accuracy of the calculated results. The study's results for transition rates deviated by no more than 20 % from reference values and showed good agreement for weighted oscillator strengths compared to Hartree-Fock Relativistic (HFR) method calculations. The line strength results served to assess the reliability of the calculated atomic structure parameters. We hope these results are anticipated to contribute to the expansion of the Cl ions database and furnish valuable help for studies within the plasma domain.