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Technical Physics

Superelastic electron scattering by metastable strontium atoms

В. І. Марушка, І. І. Shafranyosh

Published Apr 1, 2008• 0 citations
Publisher

Abstract

Superelastic electron scattering by metastable strontium atoms is experimentally studied using intersecting electron and atomic beams and an electron spectrometer. The energy dependence of the effective cross section of superelastic electron scattering in the energy range 0.15–2.0 eV has been obtained for the first time.
DOI
10.1134/s1063784208040257

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Electrons are scattered elastically by caesium atoms in a crossed-beam experiment. The dependence of the cross section on collision energy and scattering angle has been measured; the collision energies studied are in the range from 0.8 to 20 eV. Resonant structures are observed in the elastic cross section at an energy of 1.49 eV and around the 6 2 P 1/2 threshold at 1.39 eV. It is believed that the 1.49 eV resonance is due to an autoionising F state of Cs - which is consistent with theoretical predictions. The angular distributions of the elastic cross section agree satisfactorily with theory for collision energies below 2 eV. At higher energies larger deviations from theory are observed.
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