A twelve-analyzer detector system for high-resolution powder diffraction

A newly designed 12-analyzer detector system for high-resolution powder diffraction has been installed at beamline 11-BM, a dedicated powder diffraction beamline, at the Advanced Photon Source. Initial characterization of the instrument is presented.

On-line optical and X-ray spectroscopies with crystallography: an integrated approach for determining metalloprotein structures in functionally well defined states

A single-crystal microspectrophotometer has been implemented on SRS beamline 10.1 providing a unique facility for combined crystallographic with on-line XAS-optical spectroscopic measurements from the same crystal. The need for such an approach is highlighted by data showing the rapid X-ray photoreduction of type-1 Cu centres.

Disentanglement of magnetic contributions in multi-component systems by using X-ray magnetic circular dichroism at a single absorption edge

The feasibility of X-ray magnetic circular dichroism to perform element-specific magnetometry by using a single X-ray absorption edge is demonstrated in the case of rare-earth transition-metal intermetallics.

Application of a pnCCD in X-ray diffraction: a three-dimensional X-ray detector

The performance of an energy-dispersive CCD detector and its first application in a GISAXS experiment are described, and the potential of this kind of detector for future application is discussed.

The optimum conditions to collect X-ray data from very small samples

Calculations are presented for the optimum wavelength to collect X-ray diffraction data from a small protein crystal of known dimensions. These calculations are compared with the possible benefits of using a short-pulsed X-ray source.

Classification of Fe-bearing species from K-edge XANES data using two-parameter correlation plots

Methods for classifying Fe-bearing minerals according to features of their Fe K-edge XANES spectra are presented. These spectra are abstracted into two-dimensional plots in which various types of species, such as divalent or trivalent Fe oxides, fall into distinct regions.

Polarization analysis in soft X-ray diffraction to study magnetic and orbital ordering

An experimental approach to the analysis of charge, magnetic and orbital ordering in 3d transition-metal oxides is presented.

Synchrotron applications of an amorphous silicon flat-panel detector

Various characteristics of a flat-panel detector are reported. Examples are given of its applications in a synchrotron light source.

A high-temperature furnace for in situ synchrotron X-ray spectroscopy under controlled atmospheric conditions

A high-temperature furnace for spectroscopic studies of metals, alloys and other electrically conductive materials under extreme conditions is presented.

Diffraction of X-ray free-electron laser femtosecond pulses on single crystals in the Bragg and Laue geometry

A solution of the problem of dynamical diffraction for X-ray pulses with arbitrary dimensions in the Bragg and Laue cases in a crystal of any thickness and asymmetry coefficient of reflection is presented. Analysis of pulse form and duration transformation in the process of diffraction and propagation in a vacuum is conducted. It is shown that only the symmetrical Bragg case can be used to avoid smearing of reflected pulses.

Very first tests on SOLEIL regarding the Zn environment in pathological calcifications made of apatite determined by X-ray absorption spectroscopy

A first report of an X-ray absorption spectroscopy experiment at Synchrotron SOLEIL, part of a long-term study dedicated to pathological calcifications, is presented.

Structural analysis of sulfur in natural rubber using X-ray absorption near-edge spectroscopy

The opportunity to employ X-ray absorption near-edge spectroscopy techniques to investigate the alteration of the structural properties of sulfur in various vulcanized rubber sheets is presented.

On the Einstein model for EXAFS parallel and perpendicular mean-square relative displacements

The error on the absolute EXAFS mean-square relative displacements owing to the use of the Einstein-fit model has been estimated by means of dynamical simulations.

Bond cutting in K-doped tris­(8-hydroxyquinoline) aluminium

Bond-cutting of Alq₃ by the doped K atoms occurs at high K concentration in a K-doped Alq₃ layer.

Analyser-based tomography images of cartilage

Analyser-based computed tomography has been used to depict substructural variations within articular cartilage.

Visualization of age-dependent myocardial metabolic impairment in cardiomyopathic model hamster obtained by fluorescent X-ray computed tomography using I-127 BMIPP

Fluorescent X-ray computed-tomography imaging with synchrotron radiation to detect the age-dependent metabolic abnormality in cardiomyopathy is reported.

Calibration method at the N K-edge using interstitial nitrogen gas in solid-state nitrogen-containing inorganic compounds

Interstitial N₂ gas contained within solid-state inorganic ammonium- and amine-containing salts can be used to quickly and accurately calibrate soft X-ray beamlines at the N K-edge without the need for gas-cell measurements.

SaxsMDView: a three-dimensional graphics program for displaying force vectors

A new graphics program for the representation of constraint force vectors for small-angle X-ray scattering has been developed.

PI-MTE cameras now twice as fast with 2 MHz readout

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