issue contents
January 2022 issue
![Highlighted illustration](/s/issues/2022/01/00/graphics/coverill.gif)
Cover illustration: Nanotomography of a butterfly scale. A machine learning denoising filter reveals the details of the nanostructures (original left, filtered right). The background image is a photograph of scales on the butterfly wing, the colors are generated by the interaction of visible light with the nanostructures. (Photography with courtesy of K. H. Diddens. Scale bars: 2 µm). See Flenner, Bruns, Longo, Parnell, Stockhausen, Müller and Greving, pages 230–238.
facility information
actinide physics and chemistry
Open
access
![Open Access](/logos/open.png)
A spectroelectrochemical setup has been developed to investigate radioactive elements in small (0.7 to 2 ml) volumes under oxidation–reduction (redox) controlled conditions by X-ray absorption spectroscopy (XAS). The cell design is presented together with in situ XAS measurements performed during neptunium redox reactions.
Download citation
![](/logos/buttonlogos/cross.png)
Download citation
![](/logos/buttonlogos/cross.png)
Open
access
![Open Access](/logos/open.png)
The first pre-edge feature with an intensity of 0.16 in the S K-edge X-ray absorption spectra of UO2(S2PR2) (R = Ph and o-CF3C6H4) is entirely attributed to the transitions from S 1s orbitals to the unoccupied molecular orbitals due to the mixing between U 5f and S 3p orbitals.
Open
access
![Open Access](/logos/open.png)
By combining HERFD-XAS at the uranium L1-, L3- and M4-edge with relativistic quantum chemistry calculations the uranium valence electronic structure in KUO3 could be assessed in detail. The contribution of uranium and oxygen states in observed spectral features is discussed.
Open
access
![Open Access](/logos/open.png)
A water-soluble plutonium cluster made of six plutonium atoms decorated by four 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid ligands is characterized by small-angle X-ray scattering (SAXS) and extended X-ray absorption fine structure (EXAFS).
Open
access
![Open Access](/logos/open.png)
The first systematic study on U-incorporated Nd2Zr2O7 synthesized via a molten salt method for potential actinide immobilization is presented.
Open
access
![Open Access](/logos/open.png)
The mechanisms of interaction of thorium and plutonium with Fe storage horse spleen ferritin protein (L subunit) have been described by combining modeling with EXAFS data. The interaction between the L subunits and both actinides appears to be driven by the density of the presence of Asp and Glu residues on the protein shell.
Open
access
![Open Access](/logos/open.png)
Exploring the opportunities and challenges when studying actinide and lanthanide N-donor ligand systems relevant for separation technologies from the metal and ligand point of view using X-ray spectroscopy techniques and computations.
Open
access
![Open Access](/logos/open.png)
Soft X-ray spectromicroscopy at the O K-edge, U N4,5-edges and Ce M4,5-edges has been performed on focused ion beam sections of spent nuclear fuel for the first time. Analysis of oxygen spectra using a modified non-negative matrix factorization method is consistent with a thin layer of hyperstoichiometric uranium oxide having been formed at the interface of a sample consisting of primarily UO2, probably formed after sample preparation. The cerium oxidation state is shown to be predominantly trivalent, with a possible small contribution from tetravalent Ce.
Open
access
![Open Access](/logos/open.png)
The capabilities for the investigation of radionuclide materials by high-resolution X-ray emission spectroscopy techniques at the CAT-ACT beamline of the Karlsruhe Institute of Technology (KIT) Light Source have been expanded to allow for the investigation of redox-labile low-concentration samples at cryogenic temperatures.
Open
access
![Open Access](/logos/open.png)
A U LIII-edge X-ray absorption spectroscopic investigation of UVI interactions with minor cement minerals, ettringite and hydrotalcite, is reported. The study is supplemented by 27Al magic angle scattering nuclear magnetic resonance spectroscopy, X-ray diffraction and geochemical modelling.
research papers
Open
access
![Open Access](/logos/open.png)
We demonstrate the possibility of using a CMOS 2D sensor for time-resolved pump–probe XUV FEL experiments. We gained a factor of 30 in acquisition time compared to the use of a commercial CCD-BSI.
Open
access
![Open Access](/logos/open.png)
A novel scheme to measure the longitudinal emittance and phase space profile in an electron storage ring by using correlations between time and the vertical coordinate, and between energy and the horizontal coordinate, is proposed.
Open
access
![Open Access](/logos/open.png)
The concept of the Hybrid Ring, designed to be operated with the coexistence of two types of beams, is presented, with examples of application.
Open
access
![Open Access](/logos/open.png)
This study provides an extensive evaluation of the suitability of transmission detectors for use in synchrotron-based microbeam radiation therapy applications.
Open
access
![Open Access](/logos/open.png)
Results are presented for full-field transmission X-ray microscopy (TXM) acquired at different energy bandwidths; the trade-offs in achievable resolution and acquisition speed are discussed.
Open
access
![Open Access](/logos/open.png)
A crystal lens equation is deduced to address the location of the focus when monochromatic X-ray radiation encounters a bent crystal. It is extended using dynamical theory of diffraction for Laue symmetrical diffraction. Combination of polychromatic and monochromatic focusing is also discussed.
Open
access
![Open Access](/logos/open.png)
A novel scheme based on four-beam diffraction is illustrated for accurate calibration of X-ray photon energies and real-time monitoring of two-dimensional beam positions of modern synchrotron light sources.
Open
access
![Open Access](/logos/open.png)
The results of the 2018 commissioning and experimental campaigns of the new High Power Laser Facility on the Energy-dispersive X-ray Absorption Spectroscopy (ED-XAS) beamline ID24 at the ESRF are presented.
Open
access
![Open Access](/logos/open.png)
The DiffAbs beamline, the Detectors and the Design and Engineering groups at Synchrotron SOLEIL, in collaboration with ImXPAD and Cegitek companies, have developed an original and unique detector with a circular shape. This detector is based on the hybrid pixel photon-counting technology and consists of the specific assembly of 20 hybrid pixel array detector (XPAD) modules.
Open
access
![Open Access](/logos/open.png)
Tender X-ray absorption spectroscopy was successfully performed with the newly developed experimental apparatus at PAL-XFEL.
Open
access
![Open Access](/logos/open.png)
Using a deconvolution algorithm, it is shown that resonant inelastic X-ray scattering (RIXS) spectra can be reliably estimated from measurements of photoelectrons created through absorption of RIXS photons in a chosen material. The method works on previously reported data with ∼0.5 eV resolution, and simulations show its potential for accurately estimating spectral features with hundreds of meV or smaller width.
Open
access
![Open Access](/logos/open.png)
Synchrotron deep ultraviolet imaging highlighting pathological calcium oxalate detection in kidney is presented.
Open
access
![Open Access](/logos/open.png)
First results of in-line holography and holotomography from the NanoMAX beamline at MAX IV are presented.
Open
access
![Open Access](/logos/open.png)
A high-performance denoising filter based on machine learning for high-resolution synchrotron nanotomography data is analyzed and evaluated.
Open
access
![Open Access](/logos/open.png)
A pixel temporal averaging method is developed to eliminate motion artifacts and random noises aiming at real-time and in vivo radiology of mouse cerebral microvessels.
short communications
Open
access
![Open Access](/logos/open.png)
The implementation of synchrotron radiation X-ray microtomography for non-destructive visualization of the dental prenatal enamel microstructure of intact archaeological human deciduous teeth is presented and compared with the physical thin-sectioning of the same archaeological dental series. Prenatal daily enamel secretion rates, i.e. the distance between two adjacent daily enamel microstructures, have been measured with the two approaches. Results show a good agreement between physical and virtual histology.
computer programs
Open
access
![Open Access](/logos/open.png)
A family of foam-like mathematical phantoms for comparing tomography algorithms is presented.
Open
access
![Open Access](/logos/open.png)
TXM-Sandbox, a workflow software that integrates all the tools required for general transmission X-ray microscope data processing and visualization, is presented. The software is written in Python and has a graphic user interface in Jupyter Notebook.
Open
access
![Open Access](/logos/open.png)
HERMES is a graphical user interface software tool for pre-processing X-ray absorption spectroscopy data from laboratory Rowland circle spectrometers.
addenda and errata
Open
access
![Open Access](/logos/open.png)