Oscillator strengths of the transition 3p63d2D→3p53d22P0in the potassium isoelectronic sequence

Abstract

The excitation threshold and oscillator strengths for the 3p63d2D to 3p53d2 2P0 transition in Sc2+, Ti3+ and V4+ ions of the potassium sequence have been calculated using both Hartree-Fock (HF) and configuration interaction (CI) wavefunctions. For Ti3+, the HF length value of the oscillator strength (fl) is close to the recent value of Griffin et al. (1982), although for all three ions, the HF velocity value (fv) is only about half the length value. The CI values of fl and fv are in much closer agreement with each other, but differ substantially from the HF values. This demonstrates the importance of including CI for these transitions. The authors predict the positions of the multiplets 3p53d2(1D)2P0 and 3p53d2(1S)2P0 in V4+ to be 317500 cm-1 and 376000 cm-1, respectively, above the ground state.