Abstract
An advanced relativistic energy approach combined with a scattering theory is used to calculate the electron-collision excitation cross-sections, collision strengths for a number of multicharged ions. The relativistic many-body perturbation theory is used alongside the gauge-invariant scheme to generate an optimal Dirac-Kohn-Sham- Debye-Huckel one-electron representation. The results of relativistic calculation (taking into account the exchange and correlation corrections) of the electron collision cross-sections (strengths) of excitation of the transition between the fine-structure levels (2P 3/2 - 2P 1/ 2 ) of the ground state of F-like ions with Z = 19-26 and of the [2s 2 1 S-(2s2p 1 Р)] transition in the В-like O 4+ are presented and analysed.
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