Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 23: Collisions, scattering and correlation phenomena
A 23.3: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik
Elastic scattering of twisted electrons by an atomic target: Going beyond the Born approximation — •Valeriia Kosheleva1,5, V.A. Zaytsev1, A. Surzhykov2,3, V.M. Shabaev1, and Th. Stöhlker4,5,6 — 1Department of Physics, St. Petersburg State University, Universitetskaya naberezhnaya 7/9, 199034 St. Petersburg, Russia — 2Physikalisch-Technische Bundesanstalt, D-38116 Braunschweig, Germany — 3Technische Universität Braunschweig, D-38106 Braunschweig, Germany — 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany — 5Helmholtz-Institute Jena, D-07743 Jena, Germany — 6Institut fu*r Optik und Quantenelektronik, Friedrich-Schiller-Universita*t, D-07743 Jena, Germany
The elastic scattering of twisted electrons by neutral atoms is studied within the fully relativistic framework. The electron-atom interaction is taken into account in all orders, thus allowing us to explore high-order effects beyond the first Born approximation. To illustrate these effects, detailed calculations of the total and differential cross sections as well as the degree of polarization of scattered electrons are performed. Together with the analysis of the effects beyond the first Born approximation, we discuss the influence of the kinematic parameters of the incident twisted electrons on the angular and polarization properties of the scattered electrons.