Abstract
The multiconfiguration Hartree-Fock (MCHF) method is used to calculate the excitation energies and oscillator strengths, of both the length (f L) and velocity (f V) forms, for 1s22s22p63s23p63d2 D→1s22s22p63s23p53d2 2 P 0,2 D 0,2 F 0 transitions in Cr5+, Mn6+ and Fe7+ ions of the potassium isoelectronic sequence. Comparison is made with our earlier relevant results obtained by employing the configuration interaction (CI) method which is closely related to the MCHF method. Our present investigation demonstrates that the MCHF method is more accurate than the CI method in all ions of present consideration.
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