Study of critical points & spin polarization in elastic scattering of electrons by Ne & Ar atoms

The effect of exchange and absorption on the critical points has been inves tigated for elastic scattering of electrons by Ne and Ar atoms. It has been found that the exchange reduces the critical energy, whereas the absorptio n enhances it. The present values of critical points for Ne and Ar agree fa irly well with the available data and the other theoretical values. These p oints are also known to correspond to the maximum polarization of the spin of the scattered electron during elastic scattering. However in the present study it has been found that the point of maximum spin polarization is sli ghtly shifted from the critical points.