Abstract
Quasi-relativistic local spin density functional with correlation energy has been used in conjunction with the concept of Slater transition state to calculate the ( ns→ np) dipole oscillator strength in the isoelectronic series corresponding to Li(n = 2), Na(n = 3), K(n = 4), Rb(n = 5), Cs(n = 6) and Fr(n = 7) respectively. Up to three positive ions have been included in each series . A comparison with experimental and other theoretical values including correlation, relativistic and core polarization effects suggest that LSD approximation leads to reliable estimates of the dipole oscillator strengths.
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