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<p>The energies and angles of critical minima (CM) in differential cross sections (DCSs) of elastic electron scattering by atoms of the sequence from Na to Ar were calculated. The DCSs are characterized by the presence of both the low-angle and high-angle CM: four each for atoms Na, Mg and S; five each for atoms Al, Si and Ar; six for Cl atom and seven for P atom. The dependences of energies from the nucleus charge Z for some CM of these atoms are shown. In a wide range of collision energies, from 0.1 to 500&#xa0;eV, the energy dependences of the angular positions <i>θ</i><sub><i>min</i></sub>(<i>E</i>) of the minima, which appear on DCSs, were studied. The energies and angles of the total spin polarization points, the appearance of which is due to CM, were determined. Intervals where the absolute value of the Sherman functions is at least 0.20 (20%) are also determined. The phase shifts which are necessary to obtain the scattering amplitudes, Sherman functions and DCSs for above scattering process were calculated in the relativistic complex optical potential approach.</p>

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Critical minima and spin polarization in elastic electron scattering by Na, Mg, Al, Si, P, S, Cl, Ar atoms

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • V I Kelemen,
  • E Yu Remeta

摘要

The energies and angles of critical minima (CM) in differential cross sections (DCSs) of elastic electron scattering by atoms of the sequence from Na to Ar were calculated. The DCSs are characterized by the presence of both the low-angle and high-angle CM: four each for atoms Na, Mg and S; five each for atoms Al, Si and Ar; six for Cl atom and seven for P atom. The dependences of energies from the nucleus charge Z for some CM of these atoms are shown. In a wide range of collision energies, from 0.1 to 500 eV, the energy dependences of the angular positions θmin(E) of the minima, which appear on DCSs, were studied. The energies and angles of the total spin polarization points, the appearance of which is due to CM, were determined. Intervals where the absolute value of the Sherman functions is at least 0.20 (20%) are also determined. The phase shifts which are necessary to obtain the scattering amplitudes, Sherman functions and DCSs for above scattering process were calculated in the relativistic complex optical potential approach.