Screening Constants and Transition Energies

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Abstract
Atomic screening constants usually are derived by minimizing ground‐state energies or by comparing known system energies with those calculated with simple wavefunctions containing screening constants. One set was derived, however, by matching moments of simple wavefunctions containing screening constants to moments of Hartree–Fock wavefunctions. These screening constants represent the individual interactions of a given electron with each of the other electrons of the system. They are, therefore, particularly useful for calculating bound–bound and bound–free transition energies in ions. Neutral atom electron binding energies calculated using these screening constants disagreed with published best values. We adjusted the screening constants empirically to reproduce closely these best values of binding energies. Using the adjusted screening constants, we calculated K‐ and L‐shell transition energies in neutral atoms and ions and obtained good agreement with accepted values.

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