Measurement of the Lamb shift in lithiumlike uranium (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">U</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn><mml:mn>9</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>)

Schweppe, John E.; Belkacem, A.; Blumenfeld, Lev; Claytor, N.; Feinberg, B.; Gould, Harvey; Kostroun, V. E.; Lévy, Laurent; Misawa, S.; Mowat, J. R.; Prior, M. H.

doi:10.1103/physrevlett.66.1434

Cited by 244 publications

(111 citation statements)

References 21 publications

Supporting

Mentioning

101

Contrasting

Unclassified

Order By: Relevance

“…The total theoretical value of the transition energy, 280.66 (22) eV, agrees well with the related experimental values, 280.59(10) eV [42] and 280.52(10) eV [45]. Comparing the first-and second-order QED contributions, −42.93 eV and 1.45 (18) eV, respectively, with the total theoretical and experimental uncertainties, we conclude that the present status of the theory for Li-like uranium provides a test of QED on a 0.5% level to first order in α and on a 15% level to second order in α.…”

Section: Li-like Ionssupporting

confidence: 76%

“…[42] 280.59(10) Experiment [45] 280.52(10) [56] 2248(9) Table 4: The Bohr-Weisskopf correction ε, derived from experiments on muonic atoms [81], is compared with previous direct evaluations of this effect within the single-particle [77,78] and the many-particle [79,80] [78] 0.0118 0.0179 0.0179 Labzowsky et al [77] 0.0131 Tomaselli et al [79] 0.0210 Sen'kov and Dmitriev [80] 0.0095(+7, −38) …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

QED Effects in Heavy Few-Electron Ions

Shabaev

Yerokhin

Zherebtsov

et al. 2001

Atomic Physics at Accelerators: Mass Spectrometry

View full text Add to dashboard Cite

Accurate calculations of the binding energies, the hyperfine splitting, the bound-electron g-factor, and the parity nonconservation effects in heavy few-electron ions are considered. The calculations include the relativistic, quantum electrodynamic (QED), electron-correlation, and nuclear effects. The theoretical results are compared with available experimental data. A special attention is focused on tests of QED in a strong Coulomb field.

show abstract

Section: Li-like Ionssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

QED Effects in Heavy Few-Electron Ions

Shabaev

Yerokhin

Zherebtsov

et al. 2001

Atomic Physics at Accelerators: Mass Spectrometry

View full text Add to dashboard Cite

show abstract

“…Note, this is an additional distinctive feature of this particular kind of QED test. In contrast, all other atomic-structure experiments at high Z such as 1s Lamb shift [10][11][12][13], bound state g-factor [14], hyperfine splitting in hydrogen-like ions [15][16][17][18] or 2s-2p transitions in heavy Li-like systems [19][20][21] encounter the issue of large nuclear effects which may mask the physics at strong fields. typically achieved at the ESR is determined by the uncertainty of the absolute velocity.…”

mentioning

confidence: 99%

Electron-Electron Interaction in Strong Electromagnetic Fields: The Two-Electron Contribution to the Ground-State Energy in He-like Uranium

et al. 2004

View full text Add to dashboard Cite

Radiative recombination transitions into the ground state of cooled bare and hydrogen-like uranium ions were measured at the storage ring ESR. By comparing the corresponding x-ray centroid energies, this technique allows for a direct measurement of the electron-electron contribution to the ionization potential in the heaviest He-like ions. For the two-electron contribution to the ionization potential of He-like uranium we obtain a value of 2248 ± 9 eV. This represents the most accurate determination of two-electron effects in the domain of high-Z He-like ions and the accuracy reaches already the size of the specific two-electron radiative QED corrections.

show abstract

“…From the charge-specific determination of the line intensities the electron-impact excitation cross sections are inferred relative to the cross sections for the radiative recombination lines. Xenon was the element of choice due to its potential use in the next-generation fusion devices, such as the National Ignition Facility (NIF) or the International Thermonuclear Experimental Reactor (ITER), which are proposed 3, The approximate scaling behavior for both, relativistic and QED effects, is Z".…”

Section: Introductionmentioning

confidence: 99%

High–resolution measurements of the K-shell spectral lines of hydrogenlike and heliumlike xenon

Widmann

Beiersdörfer

Brown

et al. 2000

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract.With the implementation of a transmission-type curved crystal spectrometer at the Livermore high-energy electron beam ion trap (SuperEBIT) the window on sub-eV level measurements of the ground-state quantum electrodynamics and the twoelectron quantum electrodynamics of high-Z ions has been opened. High-resolution spectroscopic measurements of the Kcr spectra of hydrogenlike Xe53+ and heliumlike Xe52+ are presented. The electron-impact excitation cross sections have been determined relative to the radiative recombination cross sections. The electron-impact energy was 112 keV which is about 3.7 times the excitation threshold for the n = 2 -+ 1 transitions. Although the relative uncertainties of the measured electron-impact excitation cross sections range from about 20% to 50% , significant disagreement between the measured and calculated cross section values has been found for one of the heliumlike xenon lines. Overall, the comparison between experiment and theory shows that already for xenon (Z=54) the Breit interaction plays a significant part in the collisional excitation process. The measured cross sections for the hydrogenlike transitions are in good agreement with theoretical predictions. Additionally, the Xe53+ Ly-or transition energy has been measured utilizing the Kcr emission of neutral cesium and barium for calibration. Surprisingly, the experimental result, (31279.2 f. 1.5) eV, disagrees with the widely accepted theoretically predicted value of (31283.77 f 0.09) eV. However, this disagreement does not (yet) call for any correction in respect to the theoretical values for the transition energies of the hydrogenlike isoelectronic sequence. It rather emphasizes the need for a reevaluation of the commonly used x-ray wavelengths table for atomic inner-hell transitions, in particular, for the cesium KQ lines. r) Email: widmannl@llnl.gov. 2, Present address:

show abstract

Measurement of the Lamb shift in lithiumlike uranium (U89+)

Cited by 244 publications

References 21 publications

QED Effects in Heavy Few-Electron Ions

QED Effects in Heavy Few-Electron Ions

Electron-Electron Interaction in Strong Electromagnetic Fields: The Two-Electron Contribution to the Ground-State Energy in He-like Uranium

High–resolution measurements of the K-shell spectral lines of hydrogenlike and heliumlike xenon

Contact Info

Product

Resources

About