Elastic scattering of electrons by helium at intermediate energies

A modified Glauber amplitude proposed earlier by this author for electron-atom scatterings is applied to the analysis of elastic scattering of electrons by helium at various intermediate energies. The results are found to be in good agreement with experimental data acquired by various research groups with absolute measurements. Thus, the present work confirms reasonably clearly that the failure of the Glauber approximation for elastic scattering of electrons by helium stems mainly from the inadequacy of its second-order eikonal term. A comparison with results of other methods of approximation will also be made