Abstract
The feasibility of studying the energetics of light impurities in metallic hosts by treating the impurity ion plus its screening cloud as a unit, or “quasi-atom”, is explored. In the simplest approximation the energy of the impurity is given in terms of the local host electron density. This approach is tested against results taken from the literature for the energy of light atoms in inhomogeneous electronic environments. Corrections to the simplest approximation are discussed.
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