Single-photon excitation of Kα in heliumlike Kr34+: Results supporting quantum electrodynamics predictions

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, J. R. Crespo López-Urrutia

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We study two fundamental transitions from the ground state S01 to P11 (w line) and P13 (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 E¯Lit(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.

Original languageEnglish
Article number020502
JournalPhysical Review A. Atomic, Molecular and Optical Physics
Volume92
Issue number2
DOIs
Publication statusPublished - 12 Aug 2015
Externally publishedYes

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