Abstract
Using a multi-configuration Hartree-Fock (MCHF) approximation for the stationary states, the effect of correlation on the excitation probability, Kr 4p61S→ Rb+ 4p5 5p1S is studied. It is shown that the MCHF approximation equivalent to a nonorthogonal Hartree-Fock approximation, is the most important correction to the Hartree-Fock total wave function, and that the remaining correlation, though significant, has a much smaller effect.
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