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, Stanislav Tashenov

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13 Citations (Scopus)

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.

Original languageEnglish
Article number022712
JournalPhysical Review A
Volume95
Issue number2
DOIs
Publication statusPublished - 13 Feb 2017

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