Binding energy of positronium chloride: A quantum Monte Carlo calculation

Abstract
The binding energy of positronium chloride is calculated using a model potential for the ten core electrons and the quantum Monte Carlo method for the eight valence electrons and the positron. The result is 1.91±0.16 eV. Except for three- and four-particle systems, this is the first accurate calculation of the binding energy of a compound containing a positron.