Oscillator strengths for 3 [formula omitted]D– [formula omitted]F transitions of the lithium isoelectronic sequence

Abstract

The nonrelativistic dipole-length, -velocity and -acceleration absorption oscillator strengths for the 1s 23d–1s 2 nf (4≤ n≤9) transitions of the lithium isoelectronic sequence up to Z=10 are calculated by using the energies and the multiconfiguration interaction wave functions obtained from a full core plus correlation (FCPC) method. In most cases, the agreement between the f-values from the length and velocity formulae is up to forth or fifth digits. Combining these discrete oscillator strengths with the single channel quantum defect theory (QDT), the discrete oscillator strengths for the transitions from 1s 23d state to highly excited levels ( n≥10) and the oscillator strength densities corresponding to the bound-free transitions are obtained.