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

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Shah,  Chintan
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Steinbrügge,  René Friedrich
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Beilmann,  Christian
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Bernitt,  Sven
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Crespo López-Urrutia,  José R.
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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1701.09044
(Preprint), 3MB

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Citation

Amaro, P., Shah, C., Steinbrügge, R. F., Beilmann, C., Bernitt, S., Crespo López-Urrutia, J. R., et al. (2017). State-selective influence of the Breit interaction on the angular distribution of emitted photons following dielectronic recombination. Physical Review A, 95(2): 022712. doi:10.1103/PhysRevA.95.022712.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002E-05E3-0
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.