Inclusion of local structure effects in theoretical x-ray resonant scattering amplitudes using ab initio x-ray-absorption spectra calculations

Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials

“…At an incident x-ray energy of 778 eV (λ ≈ 16 Å) the 1/e attenuation length into UO 2 at an angle of incidence of ∼ 20 • is given by Henke et al [29] as 40 nm. However, these calculations do not take account of the strong white-line resonance at the N 4 absorption edge, common for soft x-ray energies [30], so the effective penetration is certainly far less than 20 nm, probably just a few nm, making this a surface sensitive experiment. This demand of a high-quality surface is a major disadvantage in the technique, and the role this plays in assessing the overall power of the technique is, as yet, challenging.…”

Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials

“…At an incident x-ray energy of 778 eV (λ ≈ 16 Å) the 1/e attenuation length into UO 2 at an angle of incidence of ∼ 20 • is given by Henke et al [29] as 40 nm. However, these calculations do not take account of the strong white-line resonance at the N 4 absorption edge, common for soft x-ray energies [30], so the effective penetration is certainly far less than 20 nm, probably just a few nm, making this a surface sensitive experiment. This demand of a high-quality surface is a major disadvantage in the technique, and the role this plays in assessing the overall power of the technique is, as yet, challenging.…”

The anodic oxidation of silver in 1 M NaOH: electrochemistry, ex situ XPS and in situ X‐ray absorption spectroscopy

“…9 For these calculations, the refractive index n D 1 υ i Łˇo f silver metal and polycrystalline Ag 2 O were used; the latter values were derived from transmission mode EXAFS spectra by means of a Kramers-Kronig transform. 23 Thus, by adjusting the thickness of the oxide layer in the calculation until a close fit to the experimental data was obtained, the thickness of the oxide can be determined. As can be seen, the electrode is oxide free for a potential of 0.3 V, as could already be deduced from the XPS data (see also Ref.…”

Phasing of resonant anomalous X-ray reflectivity spectra and direct Fourier synthesis of element-specific partial structures at buried interfaces

“…If the raw intensities are simply normalized by an ionchamber beam monitor (i.e. not the absolute incident photon flux), the RAXR spectra have an additional positive slope due to the The resonant anomalous dispersion corrections for (a) aqueous Rb + and (b) Sr 2+ species experimentally determined by measuring XANES of bulk solutions [0.1 M RbCl and Sr(NO 3 ) 2 , respectively, at pH $5.5] and using the difference Kramers-Kronig transform technique (Cross et al, 1998). The symbols correspond to the energies that were used to measure the RAXR spectra in Figs.…”

Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials

“…At an incident x-ray energy of 778 eV (λ ≈ 16 Å) the 1/e attenuation length into UO 2 at an angle of incidence of ∼ 20 • is given by Henke et al [29] as 40 nm. However, these calculations do not take account of the strong white-line resonance at the N 4 absorption edge, common for soft x-ray energies [30], so the effective penetration is certainly far less than 20 nm, probably just a few nm, making this a surface sensitive experiment. This demand of a high-quality surface is a major disadvantage in the technique, and the role this plays in assessing the overall power of the technique is, as yet, challenging.…”

The anodic oxidation of silver in 1 M NaOH: electrochemistry, ex situ XPS and in situ X‐ray absorption spectroscopy

“…9 For these calculations, the refractive index n D 1 υ i Łˇo f silver metal and polycrystalline Ag 2 O were used; the latter values were derived from transmission mode EXAFS spectra by means of a Kramers-Kronig transform. 23 Thus, by adjusting the thickness of the oxide layer in the calculation until a close fit to the experimental data was obtained, the thickness of the oxide can be determined. As can be seen, the electrode is oxide free for a potential of 0.3 V, as could already be deduced from the XPS data (see also Ref.…”

Phasing of resonant anomalous X-ray reflectivity spectra and direct Fourier synthesis of element-specific partial structures at buried interfaces

“…If the raw intensities are simply normalized by an ionchamber beam monitor (i.e. not the absolute incident photon flux), the RAXR spectra have an additional positive slope due to the The resonant anomalous dispersion corrections for (a) aqueous Rb + and (b) Sr 2+ species experimentally determined by measuring XANES of bulk solutions [0.1 M RbCl and Sr(NO 3 ) 2 , respectively, at pH $5.5] and using the difference Kramers-Kronig transform technique (Cross et al, 1998). The symbols correspond to the energies that were used to measure the RAXR spectra in Figs.…”

Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials

“…At an incident x-ray energy of 778 eV (λ ≈ 16 Å) the 1/e attenuation length into UO 2 at an angle of incidence of ∼ 20 • is given by Henke et al [29] as 40 nm. However, these calculations do not take account of the strong white-line resonance at the N 4 absorption edge, common for soft x-ray energies [30], so the effective penetration is certainly far less than 20 nm, probably just a few nm, making this a surface sensitive experiment. This demand of a high-quality surface is a major disadvantage in the technique, and the role this plays in assessing the overall power of the technique is, as yet, challenging.…”

The anodic oxidation of silver in 1 M NaOH: electrochemistry, ex situ XPS and in situ X‐ray absorption spectroscopy

“…9 For these calculations, the refractive index n D 1 υ i Łˇo f silver metal and polycrystalline Ag 2 O were used; the latter values were derived from transmission mode EXAFS spectra by means of a Kramers-Kronig transform. 23 Thus, by adjusting the thickness of the oxide layer in the calculation until a close fit to the experimental data was obtained, the thickness of the oxide can be determined. As can be seen, the electrode is oxide free for a potential of 0.3 V, as could already be deduced from the XPS data (see also Ref.…”

Phasing of resonant anomalous X-ray reflectivity spectra and direct Fourier synthesis of element-specific partial structures at buried interfaces

“…If the raw intensities are simply normalized by an ionchamber beam monitor (i.e. not the absolute incident photon flux), the RAXR spectra have an additional positive slope due to the The resonant anomalous dispersion corrections for (a) aqueous Rb + and (b) Sr 2+ species experimentally determined by measuring XANES of bulk solutions [0.1 M RbCl and Sr(NO 3 ) 2 , respectively, at pH $5.5] and using the difference Kramers-Kronig transform technique (Cross et al, 1998). The symbols correspond to the energies that were used to measure the RAXR spectra in Figs.…”