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Polarization measurement of dielectronic recombination transitions in highly charged krypton ions

We report linear polarization measurements of x rays emitted due to dielectronic recombination into highly charged krypton ions. The ions in the He-like through O-like charge states were populated in an electron-beam ion trap with the electron-beam energy adjusted to recombination resonances in orde...

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Main Authors: Shah, Chintan (Author) , Jörg, Holger Eric (Author) , Bernitt, Sven (Author) , Dobrodey, Stepan (Author) , Steinbrügge, René (Author) , Beilmann, Christian (Author) , Amaro, Pedro (Author) , Hu, Zhimin (Author) , Weber, Sebastian (Author) , Fritzsche, Stephan (Author) , Surzhykov, Andrey (Author) , Crespo López-Urrutia, José R. (Author) , Tashenov, Stanislav (Author)
Format: Article (Journal)
Language:English
Published: 7 October 2015
In: Physical review. A, Atomic, molecular, and optical physics
Year: 2015, Volume: 92, Issue: 4
ISSN:1094-1622
DOI:10.1103/PhysRevA.92.042702
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.92.042702
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.92.042702
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Author Notes:Chintan Shah, Holger Jörg, Sven Bernitt, Stepan Dobrodey, René Steinbrügge, Christian Beilmann, Pedro Amaro, Zhimin Hu, Sebastian Weber, Stephan Fritzsche, Andrey Surzhykov, José R. Crespo López-Urrutia, and Stanislav Tashenov
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Summary:We report linear polarization measurements of x rays emitted due to dielectronic recombination into highly charged krypton ions. The ions in the He-like through O-like charge states were populated in an electron-beam ion trap with the electron-beam energy adjusted to recombination resonances in order to produce Kα x rays. The x rays were detected with a newly developed Compton polarimeter using a beryllium scattering target and 12 silicon x-ray detector diodes sampling the azimuthal distribution of the scattered x rays. The extracted degrees of linear polarization of several dielectronic recombination transitions agree with results of relativistic distorted-wave calculations. We also demonstrate a high sensitivity of the polarization to the Breit interaction, which is remarkable for a medium-Z element like krypton. The experimental results can be used for polarization diagnostics of hot astrophysical and laboratory fusion plasmas.
Item Description:Gesehen am 17.06.2020
Physical Description:Online Resource
ISSN:1094-1622
DOI:10.1103/PhysRevA.92.042702

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