Calculations of long-range three-body interactions for Li(2 2S )-Li(22 S )-Li+(1 1S)

Abstract

SynopsisUsing perturbation theory for energies, we evaluate the additive and nonadditive interaction co-efficients C4, C6 , C7 , C8 and C9 for the Li(22S)-Li(22S)-Li+(11S) system. The obtained coefficients Cn are evaluated with highly accurate variationally-generated nonrelativistic wave functions in Hylleraas coordinates. The nonadditive interaction coefficients depend on the geometrical configurations of this three-body system and on the different position of the ion for each configuration. Our calculations may be of interest for the study of three-body recombination and for constructing precise potential energy surfaces.