Constructing theoretical M-shell spectra for Mg-like Au through Cl-like Au ions in gold plasma diagnostics

The theoretical atomic structure and spectra data for electric dipole transitions in six gold ions (Au67+ through Au62+) are produced using the flexible atomic code (FAC). The produced data contain energy levels, radiative transition rates and oscillator strengths with (n = 3 → 4, 5, 6, 7). All M-shell strong lines for the six gold ions are also identified. The produced data and constructed spectra revealed the presence of a wide variety of ionization stages of Au with several blended spectral lines in the spectral range (1.7–4.4 A). Calculated energy levels are compared against published values, which were calculated using the multi-reference many body perturbation theory that includes higher order quantum electrodynamics corrections effects. Favorable agreement with <0.26% difference was observed.