Mid-to-high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>precision x-ray measurements

Kessler, E. G.; Deslattes, Richard D.; Girard, Diane; Schwitz, W.; Jacobs, Liesbet; Renner, O.

doi:10.1103/physreva.26.2696

Cited by 78 publications

(23 citation statements)

References 20 publications

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“…Subtracting [55], [56], [40] and [57], respectively. f Derived by interpolation from the widths reported for Au and Pb by Kessler et al [58]. g Derived by interpolation from the widths reported for Au and Tl by Cooper [59].…”

Section: Transition Widthsmentioning

confidence: 99%

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Energies and widths of atomic core-levels in liquid mercury

2010

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Abstract. High-resolution measurements of the photoinduced X-ray emission of liquid mercury were performed, using a transmission DuMond-type crystal spectrometer for transitions above 11 keV and a reflection von Hamos-type crystal spectrometer for transitions below 11 keV. The target X-ray fluorescence was produced by irradiating the sample with the Bremsstrahlung from X-ray tubes. The energies and natural linewidths of 6 K-shell, 26 L-shell and 2 M -shell X-ray transitions were determined. Using a least-squaresfit method to solve the two sets of equations derived from the observed transition energies and transition widths the binding energies of the subshells K to M5 and O1 and the level widths of the subshells K to N5 and O1 could also be determined.

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Section: Transition Widthsmentioning

confidence: 99%

“…For the Kβ 1,3 transitions, the widths given by Salem and Lee are also bigger than ours but consistent within the indicated errors (10%). Interpolation values obtained from the widths of the Kα 1,2 transitions of Au and Pb from [58] are also quoted. In this case, an excellent agreement with our results is observed.…”

Section: Transition Widthsmentioning

confidence: 99%

Energies and widths of atomic core-levels in liquid mercury

2010

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“…&r+dj are the adjusted energy values incorporating the current values for the x-ray standards [39] and the most recent measurement of the Si (220) 2d spacing [40,41]. For the Ka emission of barium a more recently measured value is available, &2,adj [45]. This value, too, was adjusted to the current x-ray standards.…”

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

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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:

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“…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

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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.

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Mid-to-high-Zprecision x-ray measurements

Cited by 78 publications

References 20 publications

Energies and widths of atomic core-levels in liquid mercury

Energies and widths of atomic core-levels in liquid mercury

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

X-ray versus Auger emission following Xe 1s photoionization

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