Optimized Perturbation Theory Scheme for Calculating the Interatomic Potentials and Hyperfine Lines Shift for Heavy Atoms in the Buffer Inert Gas

摘要

A new relativistic approach, based on the gauge-invariant perturbation theory (PT), is applied to calculate the interatomic potentials and hyperfine structure line collision shifts for the alkali and lanthanide atoms in an atmosphere of the inert gases. Data on the interatomic potentials and collision shifts for Rb, Cs, and Yb atoms in an atmosphere of the inert gas He are presented.