Abstract

Atomic spectral data of six argon ions from Ar9+ to Ar14+ are calculated by combining the relativistic multi-configuration interaction method and the many-body perturbation theory (FAC-MBPT) method. Transitions from shell number n=2 to shell numbers n=3, 4, 5, and 6 are investigated where relativistic effects, correlation effects, and QED effects are applied. Experimental transition lines often demonstrate blending and overlapping that confuse the identification of spectral lines in absence of accurate theoretical data. This elucidates the importance of having accurate atomic calculations in order to carry out reliable modelling for laboratory and astrophysical spectra of Ar ions. When compared with published data, our findings offer the best agreement with experimental observations; thereby recommend the use of FAC-MBPT calculation method to produce accurate theoretical data for the six investigated Ar ions.

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