State-selective influence of the Breit interaction on the angular distribution of emitted photons following dielectronic recombination

Pedro Amaro, Chintan Shah, Rene Steinbrügge, Christian Beilmann, Sven Bernitt, José R. Crespo López-Urrutia, and Stanislav Tashenov
Phys. Rev. A 95, 022712 – Published 13 February 2017

Abstract

We report a measurement of KLL dielectronic recombination in charge states from Kr+34 through Kr+28 in order to investigate the contribution of the Breit interaction for a wide range of resonant states. Highly charged Kr ions were produced in an electron-beam ion trap, while the electron-ion collision energy was scanned over a range of dielectronic recombination resonances. The subsequent Kα x rays were recorded both along and perpendicular to the electron-beam axis, which allowed the observation of the influence of the Breit interaction on the angular distribution of the x rays. Experimental results are in good agreement with distorted-wave calculations. We demonstrate, both theoretically and experimentally, that there is a strong state-selective influence of the Breit interaction that can be traced back to the angular and radial properties of the wave functions in the dielectronic capture.

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  • Received 27 December 2016

DOI:https://doi.org/10.1103/PhysRevA.95.022712

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Pedro Amaro1,*, Chintan Shah1,2, Rene Steinbrügge2,†, Christian Beilmann1,2,‡, Sven Bernitt2,§, José R. Crespo López-Urrutia2, and Stanislav Tashenov1

  • 1Physikalisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
  • 2Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany

  • *Present address: LIBPhys-UNL, FCT-UNL, P-2829-516, Caparica, Portugal; pdamaro@fct.unl.pt
  • Present address: TRIUMF, 4004 Wesbrook Mall, Vancouver, Canada.
  • Present address: Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
  • §Present address: Institut für Optik und Quantenelektronik, D-07743 Jena, Germany.

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Issue

Vol. 95, Iss. 2 — February 2017

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