Backscattering X-ray standing waves in the XUV region

X-ray standing waves are generated in (001) backscattering geometry for a TiSe₂ single crystal at hν ≃ 1033 eV. The modulation of the photoelectron yield was measured as a function of the photon energy. The data reveal disorder along the c-axis.

X-ray magnetic circular dichroism imaging with hard X-rays

X-ray polarization-contrast images due to X-ray magnetic circular dichroism in the hard X-ray region have been successfully recorded for the first time.

Synchrotron radiation circular dichroism spectroscopy: vacuum ultraviolet irradiation does not damage protein integrity

To test for the extent of radiation damage occurring during synchrotron radiation circular dichroism (SRCD) spectroscopic measurements at vacuum ultraviolet wavelengths, the chemical integrity and secondary structure of the protein myoglobin were examined by gel electrophoresis, mass spectrometry and SRCD spectroscopy. No changes were detected by any of these methods even after extensive irradiation, indicating that damage does not occur during SRCD measurements.

Preliminary experiment of fluorescent X-ray computed tomography to detect dual agents for biological study

The simultaneous detection of contrast agents by fluorescent X-ray computed tomography (FXCT) with synchrotron radiation is examined. FXCT could image the distribution of both iodine and xenon agents in a phantom clearly and the contrast ratio was significantly better than that of transmission X-ray computed tomography images.

Phase determination by wavelength-modulated diffraction. I. Centrosymmetric case

A 2.3 to 25 keV XAS beamline at LNLS

A 2.3 to 25 keV XAS beamline at LNLS is described. Its main characteristics, regarding photon flux, harmonic contamination, energy resolution and energy stability, are discussed in terms of recent commissioning results.

A new ray-tracing program RIGTRACE for X-ray optical systems

A new ray-tracing program has been developed. It traces consecutively each ray, following its path, and treats diffraction by a monochromator crystal by adopting the Darwin–Prins theory.

A new implementation of the molecular replacement method using a six-dimensional Patterson vector search

A six-dimensional exhaustive search algorithm has been developed to search unknown target structures in the Patterson vector space. The determination of both the rotation and translation parameters simultaneously is shown to have several advantages.

Wet-etched diffractive lenses for hard X-rays

The fabrication and testing of linear silicon diffractive lenses for hard X-rays is described.

Counting the number of di­sulfides and thiol groups in proteins and a novel approach for determining the local pK_a for cysteine groups in proteins in vivo

Examples are reported of how X-ray absorption spectroscopy can be used as a powerful tool for investigating sulfur in biological molecules.

Non-reciprocal X-ray linear dichroism

A new optical effect observed by Goulon et al. using linearly polarized synchrotron radiation is briefly reviewed with the underlying simplicity discussed from a symmetry point of view.

JASRI and CCLRC conclude a Memorandum of Understanding

LCLS appoints a Director

SESAME goes to Jordan

Synchrotron Light to Explore Matter