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Magnetic-sublevel population and alignment for the excitation of H- and He-like uranium in relativistic collisions

We have measured the alignment of the L-shell magnetic substates following the K-shell excitation of hydrogen- and helium-like uranium in relativistic collisions with a low-Z gaseous target. Within this experiment, the population distribution for the $L$-shell magnetic sublevels has been obtained vi...

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Bibliographic Details
Main Authors: Gumberidze, Alexandre (Author) , Fritzsche, S. (Author) , Hagmann, S. (Author) , Kozhuharov, C. (Author) , Ma, X. (Author) , Steck, M. (Author) , Surzhykov, Andrey (Author) , Warczak, A. (Author) , Stöhlker, Thomas (Author)
Format: Article (Journal)
Language:English
Published: 17 October 2011
In: Physical review. A, Atomic, molecular, and optical physics
Year: 2011, Volume: 84, Issue: 4, Pages: 1-6
ISSN:1094-1622
DOI:10.1103/PhysRevA.84.042710
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.84.042710
Verlag, lizenzpflichtig, Volltext: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.84.042710
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Author Notes:A. Gumberidze, S. Fritzsche, S. Hagmann, C. Kozhuharov, X. Ma, M. Steck, A. Surzhykov, A. Warczak, and Th Stöhlker
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Summary:We have measured the alignment of the L-shell magnetic substates following the K-shell excitation of hydrogen- and helium-like uranium in relativistic collisions with a low-Z gaseous target. Within this experiment, the population distribution for the $L$-shell magnetic sublevels has been obtained via an angular differential study of the decay photons associated with the subsequent deexcitation process. The results show a very distinctive behavior for the H- and He-like heavy systems. In particular, for $K\ensuremath{\rightarrow}L$ excitation of He-like uranium, a considerable alignment of the $L$-shell levels was observed. A comparison of our experimental findings with recent rigorous relativistic predictions provides a good qualitative and a reasonable quantitative agreement, emphasizing the importance of the magnetic-interaction and many-body effects in the strong-field domain of high-$Z$ ions.
Item Description:Gesehen am 20.07.2022
Physical Description:Online Resource
ISSN:1094-1622
DOI:10.1103/PhysRevA.84.042710

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