Critical minima and total polarization points for electron elastic scattering from Li, Be, B, C, N, O, F, Ne atoms

Abstract

The energies and angles of critical minima (CM) in differential cross sections (DCSs) of elastic electron scattering by light atoms of the sequence from Li to Ne were calculated. The DCSs are characterized by the presence of the high-angle CM, larger than 90°. The dependences of energies and angles of CM of these atoms on the nucleus charge Z are shown. In a wide range of collision energies, from 0.1 to 500 eV, the energy dependences of the angular positions θ_min(E) of the minima, which appear on DCSs, were studied. The energies and angles of the total spin polarization points in small energy and angular vicinities of CM were determined. The intervals where the absolute value of the Sherman functions is at least 0.2 (20%) are also determined. The phase shifts, scattering amplitudes, Sherman functions and DCSs were calculated in the relativistic complex optical potential approach.