Rostock 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 23: Collisions, scattering and correlation phenomena

A 23.1: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Resonant electron scattering in two-center atomic systems — •Alexandra Eckey, Alexander B. Voitkiv, and Carsten Müller — Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf

Electron scattering from an ion in the presence of a neighboring atom is studied theoretically. The incident electron is assumed to be captured by the ion, leading to resonant excitation of the atom which afterwards stabilizes by electron re-emission. We show that the participation of the atom can strongly affect, both quantitatively and qualitatively, the scattering process. Various ion-atom systems and electronic transitions are considered, accounting for quantum interference between the resonant two-center channel and the direct channel of Rutherford scattering from the ion. We show that electron scattering under backward angles may be strongly enhanced, provided the incident electron energy lies very close to the resonance. Due to constructive and destructive interferences, also scattering at intermediate angles can be affected significantly.
[1] A. Eckey, A.Jacob, A. B. Voitkiv and C. Müller, Phys. Rev. A 98, 012710 (2018)