issue contents

Journal logoJOURNAL OF
ISSN: 1600-5775

September 2007 issue

Highlighted illustration

Cover illustration: Three-dimensional representations of domains of polyacrylate and polystyrene comprising micrometer-sized water-filled capsules suspended in water generated by soft X-ray scanning transmission microtomography (see Johansson, Tyliszczak, Mitchell, Keefe and Hitchcock, pages 395-402). Near-edge X-ray absorption fine-structure spectroscopy was used to map the polyacrylate distribution by utilizing an absorption peak at 532.2 eV for the O 1s [rightwards arrow] [pi]*(C=O) transition of the polyacrylate.

facility information

research papers

J. Synchrotron Rad. (2007). 14, 395-402
doi: 10.1107/S0909049507029962
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Three-dimensional chemical mapping using angle-scan tomography in a scanning transmission X-ray microscope is demonstrated and used to quantitatively map a low-density polyacrylate inside submicrometer polystyrene microspheres in water with 50 nm spatial resolution.

J. Synchrotron Rad. (2007). 14, 403-408
doi: 10.1107/S0909049507028683
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This paper describes the experimental set-up developed on the LUCIA beamline in order to perform at the same time X-ray and Raman spectroscopy experiments on the same microsized sample spot. Some applications of these two combined techniques on mineral samples are also presented.

J. Synchrotron Rad. (2007). 14, 409-415
doi: 10.1107/S0909049507030099
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The present paper demonstrates the feasibility of X-ray absorption spectroscopy and X-ray magnetic circular dichroism under pulsed high magnetic fields up to 26 T and low temperatures down to 5 K on the ID24 energy-dispersive X-ray absorption spectroscopy beamline of the ESRF.

J. Synchrotron Rad. (2007). 14, 416-420
doi: 10.1107/S0909049507026507
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The magnetic field of a cryo-undulator prototype has been measured using a new technique of field mapping using a Hall probe, and the error components in the field profile have been found to be insensitive to temperature.

J. Synchrotron Rad. (2007). 14, 421-425
doi: 10.1107/S0909049507028452
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Differential extended X-ray absorption fine structure (DiffEXAFS) is a novel technique for the study of small atomic strains. Here the development of this technique to the measurement of thermally induced strain is presented. Thermal DiffEXAFS measurements have been performed on α-Fe and SrF2, yielding α = (11.6 ± 0.4) × 10−6 K−1 and (19 ± 2) × 10−6 K−1, respectively. These are in good agreement with accepted values, proving the viability of the technique. Analysis has revealed sensitivity to mean atomic displacements of 0.3 fm.

J. Synchrotron Rad. (2007). 14, 426-432
doi: 10.1107/S0909049507031901
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A new mother wavelet function for extended X-ray absorption fine-structure (EXAFS) data analysis has been designed, combining a model EXAFS function derived from the ab initio EXAFS code FEFF8.20 and the complex Morlet wavelet.

J. Synchrotron Rad. (2007). 14, 433-438
doi: 10.1107/S0909049507027264
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A novel Laue focusing monochromator, developed at the SRS, Daresbury Laboratory, is employed on a beamline dedicated to high-pressure diffraction experiments. Monochromator characteristics, features of the beamline design, and results from diffraction experiments are reported in this study.

J. Synchrotron Rad. (2007). 14, 439-445
doi: 10.1107/S0909049507029664
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A ray-trace model of a two-dimensional beam-position and profile monitor is presented. The model has produced beam images and beam profiles that are in agreement with experimentally collected data.

short communications

J. Synchrotron Rad. (2007). 14, 446-448
doi: 10.1107/S0909049507029809
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The use of a grazing angle objective for high-sensitivity in situ synchrotron far-infrared spectromicroscopy in electrochemistry has been demonstrated. The oxide film on a copper microelectrode, at high anodic potential in alkaline solution, has been determined to consist mainly of CuO with a film thickness of about 130 nm.

current events

J. Synchrotron Rad. (2007). 14, 449-450
doi: 10.1107/S0909049507038897
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