Single-photon excitation of K α in heliumlike Kr34+: results supporting quantum electrodynamics predictions

We study two fundamental transitions from the ground state 1S0 to 1P1 (w line) and 3P1 (y line) in heliumlike Kr34+ by resonant single-photon excitation using an electron-beam ion trap and monochromatic x rays at PETRA III. Our results for the transition energies E(w)=13114.47(14) eV and E(y)=13026....

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Main Authors: Epp, Sascha W. (Author) , Steinbrügge, René (Author) , Bernitt, Sven (Author) , Rudolph, J. K. (Author) , Beilmann, Christian (Author) , Bekker, H. (Author) , Müller, A. (Author) , Versolato, O. O. (Author) , Wille, H.-C. (Author) , Yavaş, H. (Author) , Ullrich, J. (Author) , Crespo López-Urrutia, José Ramon (Author)
Format: Article (Journal)
Language:English
Published: 12 August 2015
In: Physical review. A, Atomic, molecular, and optical physics
Year: 2015, Volume: 92, Issue: 2
ISSN:1094-1622
DOI:10.1103/PhysRevA.92.020502
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.92.020502
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.92.020502
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Author Notes:S.W. Epp, R. Steinbrügge, S. Bernitt, J.K. Rudolph, C. Beilmann, H. Bekker, A. Müller, O.O. Versolato, H.-C. Wille, H. Yavaş, J. Ullrich, and J.R. Crespo López-Urrutia

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520 |a We study two fundamental transitions from the ground state 1S0 to 1P1 (w line) and 3P1 (y line) in heliumlike Kr34+ by resonant single-photon excitation using an electron-beam ion trap and monochromatic x rays at PETRA III. Our results for the transition energies E(w)=13114.47(14) eV and E(y)=13026.15(14) eV are in excellent agreement with quantum electrodynamics calculations, but disagree for w with the average of the hitherto reported experimental results ELit(w)=13115.15(17) eV. Independently of any energy calibration, we obtain a value E(w)/E(y)=1.006780(7), also in consistency with predictions. 
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