Elastic scattering of electrons by calcium atoms

The differential, total, and momentum transfer cross sections along with the minima in the differential cross sections (DCSs) and the Sherman function S(theta) for the elastic scattering of electrons by calcium atoms have been calculated. These calculations are done within the framework of complex electron-atom optical potential and relativistic dynamics, in the energy range 1-2000 eV. The results obtained are in good agreement with the available experimental data and are better than the previous calculations in overall assessment. In the DCSs, the energies and angular positions of five critical minima have been confirmed. In the vicinity of these critical minima, nine maximum polarization points have been found within the range -0.90 <= S(theta) <= +0.73. Near the critical minima, a strong energy dependence of maximum polarization points is found.