Performance of the atomic and molecular physics beamline at the National Synchrotron Radiation Laboratory

An atomic and molecular physics beamline with an energy range of 7.5–124 eV has been constructed at the National Synchrotron Radiation Laboratory, The University of Science and Technology of China, for studying the spectroscopy and dynamics of atoms, molecules and clusters.

The new HMI beamline MAGS: an instrument for hard X-ray diffraction at BESSY

A new hard X-ray diffraction beamline at BESSY is now under user operation, using a 7 T multipole wiggler as a powerful source of X-rays with energies up to 30 keV. The beamline is intended for single-crystal diffraction and resonant scattering experiments for the study of ordering phenomena, phase transitions and materials science.

X-ray optics for liquid surface/interface spectrometers

A new optics scheme for liquid surface/interface spectrometers is introduced.

Synchrotron-radiation-stimulated etching of SiO₂ thin films with a tungsten nano-pillar mask

The synchrotron-radiation-stimulated etching of SiO₂ thin films with a tungsten nano-pillar mask is presented.

Piezoelectric coefficients d₁₄, d₁₆, d₃₄ and d₃₆ of an L-arginine hydrochloride monohydrate crystal by X-ray three-beam diffraction

Determination of the entire piezoelectric matrix of an L-arginine hydrochloride monohydrate single crystal by means of X-ray three-beam diffraction.

Strategies for data collection and calibration with a pinhole-geometry SAXS instrument on a synchrotron beamline

Small-angle X-ray scattering (SAXS) carried out using pinhole geometry and an area detector is a powerful and flexible technique, but subject to a number of limitations that can be greatly mitigated with relatively simple equipment and technique enhancements, as demonstrated on the ChemMatCARS SAXS/WAXS camera.

ASAXS, SAXS and SANS investigations of vulcanized elastomers filled with carbon black

The rubber vulcanization process requires ZnO particles that hide the X-ray scattering of the filler. It is shown that ASAXS allows the determination of the filler structure factor which cannot be obtained by the usual SAXS method.

X-ray intensity fluctuation spectroscopy by heterodyne detection

Homodyne and heterodyne X-ray intensity fluctuations in a latex suspension. Application to the relaxation of carbon-black-filled elastomers.

Ion distributions at charged aqueous surfaces by near-resonance X-ray spectroscopy

Energy scans at fixed momentum-transfers under specular X-ray reflectivity conditions near the L_III Cs⁺ resonance reveal the formation of a diffuse Gouy–Chapman layer at a charged aqueous surface, and also provide the anomalous f′ and f′′ terms of Cs ions in solution.

Infrared absorption change in single-walled carbon nanotubes observed by combination spectroscopy of synchrotron radiation and laser

The Drude tail due to photo-excited carriers in single-walled carbon nanotubes has been observed in the mid-infrared region by using combination spectroscopy of synchrotron radiation and Ti:sapphire laser.

In situ system for X-ray absorption spectroscopy experiments to investigate nanoparticle crystallization

A new furnace, based on a halogen lamp, and a sample cell have been designed and constructed for in situ X-ray absorption spectroscopy experiments in conventional and dispersive mode (transmission and fluorescence geometries).

The interplay of the 3d⁹ and 3d¹⁰ electronic configurations in the copper K-edge XANES spectra of Cu(II) compounds

The Cu K-edge XANES spectra of several Cu(II) compounds have been analyzed within the multichannel multiple-scattering framework. The comparison between the experimental data and computations indicates that the experimental spectra can be accounted for by using two electronic configurations, 3d⁹ and 3d¹⁰ ( being a hole from the ligand). These results suggest that the two-channels (3d⁹ and 3d¹⁰) scheme is the general case for the K-edge XANES of divalent copper systems.

EXAFS characterization of oxaliplatin anticancer drug and its degradation in chloride media

The degradation product of the anticancer drug oxaliplatin in the presence of chloride ions is studied by EXAFS. This precipitate is [Cl₂-(diaminocyclohexane)-Pt(II)].

Three-dimensional visualization of the inner structure of single crystals by step-scanning white X-ray section topography

Step-scanning white X-ray section topography is a very useful and simple technique for visualizing the three-dimensional distribution of crystal defects within large single crystals.

Calibration of spectra from dispersive XAS beamlines

The DXAS Calibration computer program provides a quantitative and automated solution to the problem of calibrating spectra from dispersive XAS beamlines.

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