Precision measurements ofKandLtransitions in xenon: Experiment and theory for theK,L, andMlevels

Mooney, Tim; Lindroth, Eva; Indelicato, P.; Kessler, E. G.; Deslattes, Richard D.

doi:10.1103/physreva.45.1531

Cited by 49 publications

(33 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…values to a 67% confidence limit by assuming Gaussian distribution and, thus, to multiply the uncertainty values by a factor of 1.48 (e.g. [42][43][44]). Table 4 also lists the most recent measurement available for the barium Ka transition energies 1451 and the transition-energy values that are currently used by the Quantum Metrology Group at the National Institute of Standards and Technology (NIST) [46\.…”

Section: Measurement Of the Transition Energiesmentioning

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

Section: Measurement Of the Transition Energiesmentioning

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

show abstract

“…The study of the dynamics of Xe photoionization and the subsequent decay of xenon around the K edge can provide fundamental information about the core-hole lifetime of such a deep vacancy, satellite structure, and interplay between radiative and nonradiative decay. However, the published literature on photoexcitation and photoionization of Xe 1s is scarce and mainly consists of absorption data complemented with theoretical calculations [4][5][6][7], and fluorescence measurements [8][9][10][11]. High-energy Auger electrons (KLL, KLM, KMM) have also been measured following β capture and internal conversion [12].…”

Section: Introductionmentioning

confidence: 99%

X-ray versus Auger emission following Xe 1s photoionization

et al. 2017

View full text Add to dashboard Cite

Xe 1s photoelectron spectra were measured at SPring-8, Japan. The core-hole lifetime broadening was found to be 9.6 eV, yielding a lifetime of ∼68 as. The amount of radiative versus nonradiative decay was assessed by recording Auger LMM spectra below and above the K edge. Below the K edge, L vacancies are produced only by direct photoionization, while above the K edge some of these vacancies are mainly produced by KL emission following 1s photoionization. Due to the dipole selection rule for x-ray emission, the dominant role of the KL relaxation process is rather directly observed.

show abstract

“…Those observations are consistent with the theoretical study of Tulkki 68 showing the evolution of XRRS into Ka and Kb XFS as the incident x-ray energy is where I(nl j ) is the subshell ionization energy. 71 Symmetric Voigt line shapes are observed, with Lorentzian widths equal to the sum of the lifetime widths 72 of a 2 p 3/2 hole (2.9 eV) and a 3d hole (0.5 eV) convoluted with a Gaussian instrumental width (ª1.6 eV). The relative intensities of the two lines are determined by the ·3d j |r|2p 3/2 Ò, j = 3/2,5/2 dipole matrix elements and multiplicity factors.…”

Section: X-ray Resonant Raman Scattering From Atomsmentioning

confidence: 93%