The total and the differential cross section for the elastic scattering of electrons on argon is calculated for energies below the ionization threshold. The phase shifts were evaluated initially in the frozen-core Hartree-Fock approximation. The correlation corrections to them are found by solving the integral equation for the reducible self-energy part of the one-particle Green's function; this procedure is equivalent to solving the Schrödinger equation with the optical potential. The optical potential, being equal to the self-energy part of the one-particle Green's function, is found using many-body perturbation theory. Presented are the results of calculations for $s,p,d, \mathrm{and} f$ phase shifts and for the differential and the total cross sections. Comparison is made with other calculations and experimental data, and a good agreement is obtained.

• Received 15 July 1981

DOI:https://doi.org/10.1103/PhysRevA.25.219