Abstract
Atomic transition probabilities and lifetimes are computedfor neutral barium using the `Hartree-Fock with relativistic corrections'(HFR) method modified to include core-valence electron correlations inthe core polarization picture. A new approach is alsoproposed and tested that combines the semiempiricalevaluation of configuration mixing coefficients withsemiempirical determination of one-electron orbitalswithin the model potential rather than the HFR scheme.The results obtained are compared with available experimental and othertheoretical data.
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