Binding energies of atomic systems by the Faddeev method

Abstract

The ground-state energies of the three-particle systems e⁺e⁺e^-, H^-, D^-, He, Li⁺ and Be²⁺ have been calculated using Faddeev theory and the method of Ball et al. (1968). The 1s, 2s and 3s terms of the Sturmian set in the expansion of the two-body collision amplitude have been retained, yielding improved agreement with experimental and variational results.