Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
A fragment of a text written in red ink is scanned at the X-ray fluorescence analysis station of the Kurchatov synchrotron radiation facility; the element distribution in the scanned region is obtained. The possibility of imaging and reading text fragments using synchrotron radiation is proved.
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
The influence of corona-discharge treatment on the physical properties and structural state of superdispersed magnetite particles is investigated. It is ascertained that corona-discharge treatment can lead to the formation of polymorphous modifications.
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
VT-23 titanium alloy is processed in the plasma of abnormal glow discharge in a gas mixture of N2 and Ar under a total pressure of 4 mbar and a partial pressure ratio of N2 : Ar = 3 : 2 at 900°C. The phase composition of the alloy is determined, the cross-section structure is studied by electron microscopy, and maps of the elemental composition in ...
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
The principles of construction and the components of a model of X-ray fluorescence signal generation are considered in this paper. It is shown that the developed model describes the X-ray spectra of various materials rather well. Issues with choosing the optimal parameters of measurements in the quantitative X-ray fluorescence analysis of individua...
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Calculations are performed together with the summarization of published data on the measurement of positron annihilation rates in a number of simple substances. The information potential of different methods underlying positron annihilation spectroscopy is analyzed as applied to the study of condensed matter. The features of the mechanism of positr...
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
The morphology, phase composition and surface structure of Fe75Si25-alloy particles are studied by electron microscopy, X-ray diffraction analysis, and Mössbauer, Auger, IR (infrared) and X-ray photoelectron spectroscopy. The alloy particles used as fillers for the polyethylene matrix are produced by high-energy ball milling in an organic medium wi...
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Data on X-ray diffraction in lanthanum diphthalocyanine pyrolysates synthesized at temperatures of 800–1800°С demonstrate the formation of an amorphous carbon phase with embedded lanthanum atoms. Low-temperature pyrolysis (800–900°С) creates layered carbon structures. Due to annealing at 1000°С, carbon integrates into globules whose number of atoms...
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Pyrolytic graphite films prepared by means of microsplitting are studied. In the samples, the alternation of pentagonal and hexagonal symmetry planes is revealed. These graphite crystal states can be classified as mesoscopic fullerene-like structures.
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Titanium dioxide nanotubes (NTs) built from various initial 2D models of TiO2 (a promising catalyst for water splitting) are investigated via density functional theory using the B3LYP hybrid exchange-correlation functional in the localized basis set of a linear combination of atomic orbitals. For TiO2 NTs (eight different types of morphology) creat...
Published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
The dynamic theory of the coherent X-ray radiation of a divergent beam of relativistic electrons generated in a single-crystal wafer under conditions of the multiple scattering of incident particles is developed. Radiation cross sections are averaged over the divergent beam of rectilinear trajectories of electrons. Expressions describing the spectr...
