Atomic structure and electron impact excitation of Al-like ions (Ga–Br)

Abstract

Dirac atomic R-matrix coupling (DARC) calculations were conducted on Al-like ions (31 ≤ Z ≤ 35), which included a total of 163 fine structure levels in both the configuration interaction and close-coupling expansions. Comparisons with previous theoretical values were made in terms of energy levels, transition wavelengths and transition rates. The results of collision strength (Ω) showed a good consistency between the current DARC and distorted wave methods. The effective collision strengths (γ) were estimated in the temperature range of 105 K–108 K. The results may be useful in the designation and analysis of extreme ultraviolet spectral lines with the exploration of new data from fusion and astrophysical plasma sources.