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.
|Journal||Physical Review A. Atomic, Molecular and Optical Physics|
|Publication status||Published - 12 Aug 2015|