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Radiative recombination of highly charged ions with polarized electrons

Anna V. Maiorova

Stephan Fritzsche

Andrey Surzhykov

Thomas Stöhlker

  • Helmholtz Institute Jena, D-07743 Jena, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany

  • Helmholtz Institute Jena, D-07743 Jena, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; and Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany

  • Physikalisch–Technische Bundesanstalt, D-38116 Braunschweig, Germany; Institut für Mathematische Physik, Technische Universität Braunschweig, D-38106 Braunschweig, Germany; and Laboratory for Emerging Nanometrology Braunschweig, D-38106 Braunschweig, Germany

  • Helmholtz Institute Jena, D-07743 Jena, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; and Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany

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Phys. Rev. A 107, 042814 – Published 21 April, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.042814

Abstract

We present a theoretical study of the radiative recombination (RR) of heavy highly charged ions with arbitrary (longitudinally and transversely) polarized electrons. In order to investigate how the spin state of incident electrons affects the linear polarization of emitted photons, we apply the density matrix theory and solutions of the relativistic Dirac equation. Explicit analytical expressions are obtained for the dependencies of the differential cross section and the polarization Stokes parameters of RR photons on the components of the incident electrons polarization vector. Detailed calculations of the degree of linear polarization and the tilt angle that characterizes the orientation of the polarization axis are carried out for radiative recombination with bare U92+ and Xe54+ ions for different polarization states of the incoming electrons. Based on the results of these calculations, we argue that the linear polarization of RR photons is very sensitive to the spin state of an electron target, and this sensitivity can be easily observed with the help of modern Compton polarization detectors.

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Phys. Rev. A 107, 042814– Published 21 April, 2023
  • Received 11 January 2023
  • Accepted 3 March 2023
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