The use of second order potentials in the theory of scattering of charged particles by atoms. VI. Elastic scattering of electrons by hydrogen and helium atoms

Angular distributions for the elastic scattering of electrons by hydrogen and helium atoms have been calculated by the second order potential method of Bransden and Coleman (1972), using a partial wave expansion and allowing for exchange, in the energy interval 50 to 200 eV. Good agreement with experimental data is obtained except at large angle scattering, for which the calculated values are up to 25% smaller than those measured.