Journal of Synchrotron Radiation

 

J. Synchrotron Rad. (2012). 19, 471-477  [ doi:10.1107/S0909049512015543 ]

A new approach to synchrotron energy-dispersive X-ray diffraction computed tomography

O. Lazzari, C. K. Egan, S. D. M. Jacques, T. Sochi, M. Di Michiel, R. J. Cernik and P. Barnes

Synopsis: A new data collection strategy for performing synchrotron energy-dispersive X-ray diffraction computed tomography has been devised which overcomes previous limitations of such methods, in particular spatial resolution.

Online 9 May 2012

 

J. Synchrotron Rad. (2012). 19, 478-482  [ doi:10.1107/S0909049512015105 ]

Chalcone JAI-51 improves efficacy of synchrotron microbeam radiation therapy of brain tumors

A. Bouchet, A. Boumendjel, E. Khalil, R. Serduc, E. Bräuer, E. A. Siegbahn, J. A. Laissue and J. Boutonnat

Synopsis: The association of microbeam radiation therapy with chemotherapeutic agent JAI-51 has been evaluated for the treatment of 9LGS implanted in rat brains, particularly the effects on the median survival time of the rats. The effects of both treatments, alone or combined, on the tumor cell cycle ex vivo have been characterized.

Online 4 May 2012

 

J. Synchrotron Rad. (2012). 19, 483-491  [ doi:10.1107/S0909049512015099 ]

Coalescence analysis for evolving foams via optical flow computation on projection image sequences

A. Myagotin, A. Ershov, L. Helfen, R. Verdejo, A. Belyaev and T. Baumbach

Synopsis: An image analysis method employing optical flow computations is proposed to localize and quantify coalescence events in series of projection images. The method was successfully tested for the study of aqueous, metal and polymer foams observed by X-ray radiography.

Online 5 May 2012

 

J. Synchrotron Rad. (2012). 19, 492-496  [ doi:10.1107/S0909049512013027 ]

On easily tunable wide-bandpass X-ray monochromators based on refraction in arrays of prisms

W. Jark

Synopsis: It will be shown that the bandpass obtainable by using arrays of prisms in an X-ray monochromator operated with an exit slit can be easily predicted analytically. Some improved monochromator designs will be presented.

Online 4 May 2012

 

J. Synchrotron Rad. (2012). 19, 497-502  [ doi:10.1107/S0909049512010710 ]

Measuring picosecond excited-state lifetimes at synchrotron sources

B. Fournier and P. Coppens

Synopsis: A new method for measurement of short excited-state lifetimes of photoactive species in crystals is described. Based on photocrystallographic techniques, the method is an alternative to emission-lifetime measurement and is also applicable to non-luminescent species. It has potential for the determination of structures of very short-lived species.

Online 9 May 2012

 

J. Synchrotron Rad. (2012). 19, 503-507  [ doi:10.1107/S0909049512015646 ]

Local structure of NiAl compounds investigated by extended X-ray absorption fine-structure spectroscopy

J. S. Tian, G. M. Han, H. Wei, T. Jin and M. S. Dargusch

Synopsis: The local structures of pure NiAl and Ti-, Co-doped NiAl compounds have been obtained utilizing extended X-ray absorption fine-structure spectroscopy.

Online 11 May 2012

 

J. Synchrotron Rad. (2012). 19, 508-520  [ doi:10.1107/S0909049512010588 ]

DESIRS: a state-of-the-art VUV beamline featuring high resolution and variable polarization for spectroscopy and dichroism at SOLEIL

L. Nahon, N. de Oliveira, G. A. Garcia, J.-F. Gil, B. Pilette, O. Marcouillé, B. Lagarde and F. Polack

Synopsis: The concept and performances of the DESIRS undulator-based VUV beamline at SOLEIL are presented, showing that DESIRS is establishing the state-of-the-art in terms of spectral resolution, spectral purity, flux and well calibrated variable polarizations.

Online 4 May 2012

 

J. Synchrotron Rad. (2012). 19, 521-524  [ doi:10.1107/S0909049512021383 ]

Synchrotron microanalysis techniques applied to potential photovoltaic materials

J. Villanova, J. Segura-Ruiz, T. Lafford and G. Martinez-Criado

Synopsis: Synchrotron microanalytical techniques such as X-ray fluorescence, X-ray beam induced current and X-ray excited optical luminescence are applied to two potential photovoltaic-related semiconductors: multicrystalline Si and single-crystal GaAs.

Online 23 May 2012

 

J. Synchrotron Rad. (2012). 19, 525-529  [ doi:10.1107/S0909049512017682 ]

Multimodal hard X-ray imaging of a mammography phantom at a compact synchrotron light source

S. Schleede, M. Bech, K. Achterhold, G. Potdevin, M. Gifford, R. Loewen, C. Limborg, R. Ruth and F. Pfeiffer

Synopsis: Dose-compatible measurements of a mammography phantom demonstrate an increase in contrast attainable through differential phase and dark-field imaging over conventional absorption-based projections. All measurements have been performed at 21 keV using a monochromatic laser-driven miniature synchrotron X-ray source (Compact Light Source).

Online 10 May 2012

 

J. Synchrotron Rad. (2012). 19, 530-535  [ doi:10.1107/S0909049512021504 ]

Atomic modifications by synchrotron radiation at the calcite-ethanol interface

I. S. Pasarín, N. Bovet, M. Glyvradal, M. M. Nielsen, J. Bohr, R. Feidenhans'l and S. L. S. Stipp

Synopsis: The evolution of the calcite-ethanol interface induced by synchrotron radiation is studied by X-ray reflectivity and X-ray photoelectron spectroscopy.

Online 12 June 2012

 

J. Synchrotron Rad. (2012). 19, 536-540  [ doi:10.1107/S090904951201789X ]

The first microbeam synchrotron X-ray fluorescence beamline at the Siam Photon Laboratory

S. Tancharakorn, W. Tanthanuch, N. Kamonsutthipaijit, N. Wongprachanukul, M. Sophon, S. Chaichuay, C. Uthaisar and R. Yimnirun

Synopsis: The first microbeam synchrotron radiation X-ray fluorescence beamline in Thailand is now available for archaeological application and others.

Online 10 May 2012

 

J. Synchrotron Rad. (2012). 19, 541-546  [ doi:10.1107/S0909049512018419 ]

Local structural studies of the cubic Cd_1-xCa_xO system through Cd K-edge extended X-ray absorption spectroscopic studies

V. Srihari, V. Sridharan, M. Nomura, V. S. Sastry and C. S. Sundar

Synopsis: Local structure studies about Cd in the Cd_1-xCa_xO solid solution through Cd K-edge EXAFS studies are described, indicating a bimodal distribution of the first nearest neighbour distance for Cd and that the optical properties should belong to a persistence type.

Online 19 May 2012

 

J. Synchrotron Rad. (2012). 19, 547-550  [ doi:10.1107/S0909049512021164 ]

Dual-detector X-ray fluorescence imaging of ancient artifacts with surface relief

D.-M. Smilgies, J. A. Powers, D. H. Bilderback and R. E. Thorne

Synopsis: Interpretation of X-ray fluorescence images of archeological artifacts is complicated by the presence of surface relief and roughness. Using two symmetrically arranged fluorescence detectors in a back-reflection geometry, the proper X-ray fluorescence yield can be distinguished from intensity variations caused by surface topography. This technique has been applied to the study of Roman inscriptions on marble.

Online 23 May 2012

 

J. Synchrotron Rad. (2012). 19, 551-558  [ doi:10.1107/S0909049512018250 ]

Dry deposition of pollutant and marker particles onto live mouse airway surfaces enhances monitoring of individual particle mucociliary transit behaviour

M. Donnelley, K. S. Morgan, K. K. W. Siu and D. W. Parsons

Synopsis: Synchrotron phase-contrast X-ray imaging was used to non-invasively examine the mucociliary transit behaviour of different particles after dry deposition into the trachea of live mice. The post-deposition behaviour of individual particles of the respiratory pollutants quarry dust, fibreglass and lead sulfide, together with reference hollow silver-coated glass beads, was examined and compared with our previous studies where the same particles were delivered within a saline carrier fluid.

Online 9 May 2012

 

J. Synchrotron Rad. (2012). 19, 559-569  [ doi:10.1107/S0909049512015579 ]

The ⁵⁷Fe Synchrotron Mössbauer Source at the ESRF

V. Potapkin, A. I. Chumakov, G. V. Smirnov, J.-P. Celse, R. Rüffer, C. McCammon and L. Dubrovinsky

Synopsis: A detailed description of the energy-domain Synchrotron Mössbauer Source at the ESRF is given and application examples are presented.

Online 11 May 2012

 

J. Synchrotron Rad. (2012). 19, 570-573  [ doi:10.1107/S090904951202050X ]

Preventing carbon contamination of optical devices for X-rays: the effect of oxygen on photon-induced dissociation of CO on platinum

P. Risterucci, G. Held, A. Bendounan, M. G. Silly, C. Chauvet, D. Pierucci, N. Beaulieu and F. Sirotti

Synopsis: A time-dependent photoelectron spectroscopy study of the chemical reactions which take place at Pt(111) surfaces is presented. It is shown that the carbon contamination layer growth can be stopped and reversed by low partial pressures of oxygen for optics operated in intense photon beams at liquid-nitrogen temperature.

Online 18 May 2012

 

J. Synchrotron Rad. (2012). 19, 574-578  [ doi:10.1107/S0909049512018535 ]

An X-ray diffraction study on a single rod outer segment from frog retina

N. Yagi, T. Matsuo and N. Ohta

Synopsis: X-ray diffraction was recorded from retinal rod outer segments of frog using a microbeam.

Online 18 May 2012

 

J. Synchrotron Rad. (2012). 19, 579-585  [ doi:10.1107/S0909049512021371 ]

Solid-phase cadmium speciation in soil using L₃-edge XANES spectroscopy with partial least-squares regression

N. Siebers, J. Kruse, K.-U. Eckhardt, Y. Hu and P. Leinweber

Synopsis: Partial least-square (PLS) regression was used to evaluate mixtures of Cd L₃-edge spectra of references compounds and the obtained PLS model was then applied to a soil sample in order to qualify and quantify the Cd species therein.

Online 23 May 2012

 

J. Synchrotron Rad. (2012). 19, 586-590  [ doi:10.1107/S0909049512012848 ]

Hybrid materials with an increased resistance to hard X-rays using fullerenes as radical sponges

A. Pinna, L. Malfatti, M. Piccinini, P. Falcaro and P. Innocenzi

Synopsis: Synchrotron radiation has been used to test the resistance to hard X-rays of hybrid organic-inorganic films doped with increasing amounts of fullerene C₆₀.

Online 1 June 2012

 

J. Synchrotron Rad. (2012). 19, 591-595  [ doi:10.1107/S0909049512022856 ]

X-ray-excited optical luminescence and X-ray absorption fine-structures studies of CdWO₄ scintillator

S. M. V. Novais, M. E. G. Valerio and Z. S. Macedo

Synopsis: Structural properties of CdWO₄ investigated by EXAFS and the role of Cd and W atoms on the XEOL mechanism of CdWO₄ are described.

Online 9 June 2012

 

J. Synchrotron Rad. (2012). 19, 596-601  [ doi:10.1107/S0909049512022224 ]

Extreme-ultraviolet compact spectrometer for the characterization of the harmonics content in the free-electron-laser radiation at FLASH

F. Frassetto, S. Coraggia, S. Dziarzhytski, N. Gerasimova and L. Poletto

Synopsis: A description of a compact spectrometer for FLASH at DESY is presented, including the design and commissioning results.

Online 9 June 2012

 

J. Synchrotron Rad. (2012). 19, 602-608  [ doi:10.1107/S0909049512022339 ]

High-energy-resolution X-ray monochromator calibration using the detailed-balance principle

J. Y. Zhao and W. Sturhahn

Synopsis: A sample-independent method is presented to calibrate an X-ray energy scale of a high-energy-resolution monochromator with sub-meV relative accuracy by using the detailed-balance principle.

Online 9 June 2012

 

J. Synchrotron Rad. (2012). 19, 609-618  [ doi:10.1107/S0909049512022844 ]

Interference phenomena of synchrotron radiation in TEY spectra for silicon-on-insulator structure

M. A. Andreeva, E. P. Domashevskaya, E. E. Odintsova, V. A. Terekhov and S. Y. Turishchev

Synopsis: The general matrix theory of the photoelectron/fluorescence excitation in anisotropic multilayer films at the total reflection condition of X-rays has been developed. The observed distortions in the total electron yield Si L_2,3 spectra measured using synchrotron radiation from a SiO₂/Si/SiO₂/c-Si sample at different glancing angles of incidence have been explained by the creation of waveguide modes in the middle Si layer.

Online 12 June 2012

 

J. Synchrotron Rad. (2012). 19, 619-626  [ doi:10.1107/S090904951201374X ]

SUMS: synchronous undulator-monochromator scans at Synchrotron Soleil

M. Izquierdo, V. Hardion, G. Renaud, L. Chapuis, R. Millet, F. Langlois, F. Marteau and C. Chauvet

Synopsis: The synchronous undulator-monochromator scans (SUMS) strategy developed at Synchrotron Soleil for performing X-ray absorption experiments at insertion-device beamlines is described.

Online 13 June 2012

 

J. Synchrotron Rad. (2012). 19, 627-636  [ doi:10.1107/S0909049512022017 ]

The dedicated high-resolution grazing-incidence X-ray scattering beamline 8-ID-E at the Advanced Photon Source

Z. Jiang, X. Li, J. Strzalka, M. Sprung, T. Sun, A. R. Sandy, S. Narayanan, D. R. Lee and J. Wang

Synopsis: The design, commissioning, unique capabilities and recent results from the dedicated grazing-incidence X-ray scattering beamline 8-ID-E at the Advanced Photon Source are described.

Online 12 June 2012

 

J. Synchrotron Rad. (2012). 19, 637-646  [ doi:10.1107/S0909049512022637 ]

The LaueUtil toolkit for Laue photocrystallography. II. Spot finding and integration

J. A. Kalinowski, B. Fournier, A. Makal and P. Coppens

Synopsis: A spot-integration method is described which does not require prior indexing of the reflections. It is based on statistical analysis of the values from each of the pixels on successive frames, followed for each frame by morphological analysis of initial masks to identify appropriate reflection footprints. The results are compared with those of the seed-skewness method which is based on minimizing the skewness of the intensity distribution within a peak's integration box.

Online 12 June 2012

 

J. Synchrotron Rad. (2012). 19, 647-653  [ doi:10.1107/S0909049512016895 ]

P03, the microfocus and nanofocus X-ray scattering (MiNaXS) beamline of the PETRA III storage ring: the microfocus endstation

A. Buffet, A. Rothkirch, R. Döhrmann, V. Körstgens, M. M. Abul Kashem, J. Perlich, G. Herzog, M. Schwartzkopf, R. Gehrke, P. Müller-Buschbaum and S. V. Roth

Synopsis: The MiNaXS (P03) beamline of the new third-generation synchrotron radiation source PETRA III (DESY, Germany) has been designed to perform small-, ultra-small- and wide-angle X-ray scattering in both transmission and grazing-incidence geometries. The high photon flux available at the beamline enables time-resolved investigations of kinetic phenomena with a time resolution below 100 ms. The microfocus endstation started user operation in May 2011.

Online 10 May 2012

 

J. Synchrotron Rad. (2012). 19, 654-657  [ doi:10.1107/S0909049512016883 ]

The 7BM beamline at the APS: a facility for time-resolved fluid dynamics measurements

A. Kastengren, C. F. Powell, D. Arms, E. M. Dufresne, H. Gibson and J. Wang

Synopsis: The 7BM beamline, a facility for time-resolved fluid dynamics measurements at the Advanced Photon Source, is described.

Online 11 May 2012

 

J. Synchrotron Rad. (2012). 19, 658-659  [ doi:10.1107/S0909049512027021 ]

Current events

Online 20 June 2012