Crossover and valence band Kβ X-rays of chromium oxides

Fazinić, Stjepko; Mandić, Luka; Kavčič, M.; Božičević, Iva

doi:10.1016/j.sab.2011.05.007

Cited by 25 publications

(10 citation statements)

References 68 publications

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“…The latter is not unexpected, as the observed intensity of these lines are strongly influence by sample geometry and the structure of the absorption coefficient, as measured in XANES. [74,[90][91][92][93] The issue of sample re-absorption of fluorescence prior to escape is also important in the shape of the Kβ 2,5 emission peak as its high-energy side often straddles the rising K-edge. This creates an important systematic effect in thick samples; fluorescence above the absorption edge is preferentially quenched when escaping outward from the sample bulk.…”

Section: Second Inmentioning

confidence: 99%

Benchmark results and theoretical treatments for valence-to-core x-ray emission spectroscopy in transition metal compounds

et al. 2017

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We report measurement of the valence-to-core (VTC) region of the K-shell x-ray emission spectra from several Zn and Fe inorganic compounds, and their critical comparison with several existing theoretical treatments. We find generally good agreement between the respective theories and experiment, and in particular find an important admixture of dipole and quadrupole character for Zn materials that is much weaker in Fe-based systems. These results on materials whose simple crystal structures should not, a prior, pose deep challenges to theory, will prove useful in guiding the further development of DFT and time-dependent DFT methods for VTC-XES predictions and their comparison to experiment.

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Section: Second Inmentioning

confidence: 99%

Benchmark results and theoretical treatments for valence-to-core x-ray emission spectroscopy in transition metal compounds

et al. 2017

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“…Unlike XAS and RIXS, valenceto-core measurements do not require a monochromatic and tunable x-ray source and therefore can be applied for chemical investigations using laboratory sources. 23,24 Furthermore, no need for the beam monochromacity makes valence-to-core spectroscopy a well suitable technique for x-ray free electron laser sources (XFEL). The XFEL source provides a very intense femtosecond x-ray pulse, which has a large energy bandwidth ( E/E∼0.2%) and a large variation of the shotto-shot mean energy.…”

Section: Introductionmentioning

confidence: 99%

A von Hamos x-ray spectrometer based on a segmented-type diffraction crystal for single-shot x-ray emission spectroscopy and time-resolved resonant inelastic x-ray scattering studies

Szlachetko

Nachtegaal

Boni

et al. 2012

Review of Scientific Instruments

167

145

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We report on the design and performance of a wavelength-dispersive type spectrometer based on the von Hamos geometry. The spectrometer is equipped with a segmented-type crystal for x-ray diffraction and provides an energy resolution in the order of 0.25 eV and 1 eV over an energy range of 8000 eV-9600 eV. The use of a segmented crystal results in a simple and straightforward crystal preparation that allows to preserve the spectrometer resolution and spectrometer efficiency. Application of the spectrometer for time-resolved resonant inelastic x-ray scattering and single-shot x-ray emission spectroscopy is demonstrated.

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“…But in principle there should be effects similar in PIXE as have been exploited in XPS (and XRF and other techniques) for the last several decades. The chemical shift between the oxide, nitride and carbide of the Si Kα line were measured at 0.2, 0.4 and 0.55eV respectively with a wavelength dispersive system [101], the S Kα line shifts over 1 eV for sulphates [102], and the Ni K-line absorption-edge energy was found to shift to higher values by about 1.5 eV per unit change in valency of nickel [103]; chemical shifts for Kβ [104] [105] are up to 2 eV per unit change in valency, and those for L lines are similar. For example, about 1 eV/valency was observed by sy-XAFS for Ti Lα lines [106].…”

Section: Chemical Analysis With Ibamentioning

confidence: 99%