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Title: Relativistic theory of the double photoionization of heliumlike atoms

Abstract

A fully relativistic calculation of the double photoionization of heliumlike atoms is presented. The approach is based on the partial-wave representation of the Dirac continuum states and accounts for the retardation in the electron-electron interaction as well as the higher-order multipoles of the absorbed photon. The electron-electron interaction is taken into account to the leading order of the perturbation theory. The relativistic effects are shown to become prominent already for the medium-Z ions, changing the shape and the asymptotic behavior of the photon energy dependence of the ratio of the double-to-single photoionization cross section.

Authors:
 [1];  [2];  [3];  [1];  [2]
  1. Institute of Physics, University of Heidelberg, Philosophenweg 12, D-69120 Heidelberg (Germany)
  2. (Germany)
  3. (Russian Federation)
Publication Date:
OSTI Identifier:
22068705
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ASYMPTOTIC SOLUTIONS; ATOMS; CROSS SECTIONS; ELECTRON-ELECTRON COLLISIONS; ELECTRON-ELECTRON COUPLING; ELECTRON-ELECTRON INTERACTIONS; ENERGY DEPENDENCE; IONS; MULTIPOLES; PARTIAL WAVES; PERTURBATION THEORY; PHOTOIONIZATION; PHOTONS; RELATIVISTIC RANGE; SHAPE

Citation Formats

Yerokhin, Vladimir A., GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Center for Advanced Studies, St. Petersburg State Polytechnical University, Polytekhnicheskaya 29, St. Petersburg 195251, Surzhykov, Andrey, and GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt. Relativistic theory of the double photoionization of heliumlike atoms. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.032703.
Yerokhin, Vladimir A., GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Center for Advanced Studies, St. Petersburg State Polytechnical University, Polytekhnicheskaya 29, St. Petersburg 195251, Surzhykov, Andrey, & GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt. Relativistic theory of the double photoionization of heliumlike atoms. United States. doi:10.1103/PHYSREVA.84.032703.
Yerokhin, Vladimir A., GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Center for Advanced Studies, St. Petersburg State Polytechnical University, Polytekhnicheskaya 29, St. Petersburg 195251, Surzhykov, Andrey, and GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt. Thu . "Relativistic theory of the double photoionization of heliumlike atoms". United States. doi:10.1103/PHYSREVA.84.032703.
@article{osti_22068705,
title = {Relativistic theory of the double photoionization of heliumlike atoms},
author = {Yerokhin, Vladimir A. and GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt and Center for Advanced Studies, St. Petersburg State Polytechnical University, Polytekhnicheskaya 29, St. Petersburg 195251 and Surzhykov, Andrey and GSI Helmholtzzentum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt},
abstractNote = {A fully relativistic calculation of the double photoionization of heliumlike atoms is presented. The approach is based on the partial-wave representation of the Dirac continuum states and accounts for the retardation in the electron-electron interaction as well as the higher-order multipoles of the absorbed photon. The electron-electron interaction is taken into account to the leading order of the perturbation theory. The relativistic effects are shown to become prominent already for the medium-Z ions, changing the shape and the asymptotic behavior of the photon energy dependence of the ratio of the double-to-single photoionization cross section.},
doi = {10.1103/PHYSREVA.84.032703},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}