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High precision hyperfine measurements in Bismuth challenge bound-state strong-field QED [PDF]
Nature Communications, 2017 Electrons bound in highly charged heavy ions such as hydrogen-like bismuth 209Bi82+ experience electromagnetic fields that are a million times stronger than in light atoms. Measuring the wavelength of light emitted and absorbed by these ions is therefore
Wilfried Nörtershäuser +2 more
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Precision measurement of relativistic and QED effects in heliumlike beryllium
Physical Review Letters, 1993We have used fast-ion-beam laser spectroscopy to measure the 1s2s 3 S-1s2p 3 P o intervals in Be III to an absolute accuracy of 1 part in 10 8 . Our results are (in cm -1 ): σ(1s2s 3 S 1 -1s2p 3 P 0 o )= 26 864.6120(4), σ(1s2s 3 S 1 -1s2p 3 P 1 o )=26 853.0534(3), σ(1s2s 3 S 1 -1s2p 3 P 2 o ) =26 867.9484(3).
, Scholl +6 more
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Precision measurements of relativistic and QED effects in helium-like boron
Physical Review Letters, 1991We have made precision wavelength measurements on the 1s2s $^{3}$${\mathit{S}}_{1}$--1s2p $^{3}$${\mathit{P}}_{0,1,2}$\ifmmode^\circ\else\textdegree\fi{} transitions in heliumlike boron using fast-beam laser excitation. These measurements are accurate to 2 parts in ${10}^{7}$ of the transition energy and test the most recent calculations at a level of ...
, Dinneen +4 more
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High Precision Wavelength Measurements of QED-Sensitive Forbidden Transitions in Highly Charged Argon Ions [PDF]
Physical Review Letters, 2003 We present the results of an experimental study of magnetic dipole (M1) transitions in highly charged argon ions (Ar X, Ar XI, Ar XIV, Ar XV) in the visible spectral range using an electron beam ion trap.
Ilya Tupitsyn +2 more
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Precision Tests of QED in Strong Fields and Nuclear Contributions
1995The most simple of all atoms is hydrogen. One might imagine that its fundamental structure should allow for a theoretical description of the hydrogen spectrum at least as accurate as given by experiment. But as a matter of fact theory could not meet this requirement. E.
G. Soff +3 more
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High Precision Test of QED and Determination of α
1983Based on the QED outlined by this author in III, I shall discuss in this section the present status of comparison of QED predictions and experiments.
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Metallic magnetic calorimeters for high precision QED tests at GSI∕FAIR
AIP Conference Proceedings, 2009The quantum electrodynamics belongs to the best tested and established theories in modern physics. However, the evaluation of high order processes, as necessary in the presence of large electric fields, is still demanding. Of particular interest in this field is the Lamb shift of highly charged, hydrogen‐like ions, as the theoretically claimed error ...
C. Pies +8 more
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Status of Precision QED in Light and Heavy Atoms
1987This paper presents a review of QED in various systems. Precision tests in weakly bound systems are reviewed, tests of radiative corrections in highly ionized atoms and inner shells of neutral heavy atoms are described, and a more speculative application of QED to quarks bound in a cavity is presented.
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Precision energy-level measurements and QED of highly charged ions
Canadian Journal of Physics, 2009A review is given of measurements involving the K-shell (np → 1s) transitions of hydrogenlike ions. In many experiments carried out, for example, on electron-beam ion traps and tokamaks, the calculated energies of the Lyman-series lines are utilized as calibration standards for measuring the energies of lines from more complex ions.
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An introduction about precise measurements of QED γ structure functions
AIP Conference Proceedings, 1990Method of measuring QED photon structure functions in pure QED processes is discussed.(AIP)
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