Theory and Applications of X-ray Standing Waves in Real Crystals

Theoretical aspects of x-ray standing wave method for investigation of the real structure of crystals are considered in this review paper. Starting from the general approach of the secondary radiation yield from deformed crystals this theory is applied to different concreat cases. Various models of deformed crystals like: bicrystal model, multilayer model, crystals with extended deformation field are considered in detailes. Peculiarities of x-ray standing wave behavior in different scattering geometries (Bragg, Laue) are analysed in detailes. New possibilities to solve the phase problem with x-ray standing wave method are discussed in the review. General theoretical approaches are illustrated with a big number of experimental results.Comment: 101 pages, 43 figures, 3 table

Interaction of photons with plasmas and liquid metals: photoabsorption and scattering

Formulas to describe the photoabsorption and the photon scattering by a plasma or a liquid metal are derived in a unified manner with each other. It is shown how the nuclear motion, the free-electron motion and the core-electron behaviour in each ion in the system determine the structure of photoabsorption and scattering in an electron-ion mixture. The absorption cross section in the dipole approximation consists of three terms which represent the absorption caused by the nuclear motion, the absorption owing to the free-electron motion producing optical conductivity or inverse Bremsstrahlung, and the absorption ascribed to the core-electron behaviour in each ion with the Doppler correction. Also, the photon scattering formula provides an analysis method for experiments observing the ion-ion dynamical structure factor (DSF), the electron-electron DSF giving plasma oscillations, and the core-electron DSF yielding the X-ray Raman (Compton) scattering with a clear definition of the background scattering for each experiment, in a unified manner. A formula for anomalous X-ray scattering is also derived for a liquid metal. At the same time, Thomson scattering in plasma physics is discussed from this general point of view.Comment: LaTeX file: 18 pages without figur

Особенности эксергетического анализа энергоресурсосберегающих систем водного хозяйства

The specific features of applying the exergy analysis method for the energy resource saving waterworks systems of industrial plants were considered. The analysis of the influence of changes in polluting substance mass loading value on changes in exergy value upon mixing water technological flows was carried out.Рассмотрены особенности применения метода эксергетического анализа энергоресурсо-сбе-регающих систем водного хозяйства промышленных предприятий. Проведен анализ влияния изменения величины массовой нагрузки по загрязняющему веществу на изменение значения эксергии при смешивании водных технологических потоков

Интегрированная ресурсосберегающая система водопотребления и водоотведения стекольного производства

The methodology of designing of water resource-saving chemical process of glass works has been proposed. The basis of it is thermodynamic approach to analysis and synthesis (designing) of processes (the application of thermodynamic exergy method). The proposed methodology was approved by water chemical process designing of large-scale glass enterprises (production of glass fiber, glass cloth, hardened glass).Предложена методология проектирования водных ресурсосберегающих химико- технологических систем стекольных производств. Основой ее служит термодинамический подход к анализу и синтезу (проектированию) производственных процессов (применение термодинамического эксергетического метода). Предло- женная методология апробирована при проектировании водных химико-технологических систем крупных стекольных предприятий (производств по выпуску стекловолокна, стеклоткани, бронированного стекла)

Silver(I) coordination compounds with polydentate pyrimidine ligands: thermochromism of luminescence

The main goal of this work is to study how the substituent in position 2 of the pyrimidine ring affects both luminescent properties and structures of silver(I) complexes. A series of coordination compounds, [AgL1NO3], [AgL1X]n, [Ag2(L2)2X2] (X = I, Br, Cl–), [AgL1(PPh3)Y] (Y = CF3SO3, BF4, NO3), [AgL3NO3·CH3CN]n, have been synthesized and structurally characterized. According to the X-ray single data, the complexes [AgL1NO3], [AgL1(PPh3)Y] adopt mononuclear structures; the complexes [Ag2(L2)2X2] are binuclear; [AgL1X]n and [AgL3NO3·CH3CN]n are polymeric compounds.The research was supported by the President of the Russian Federation Grant for young scientists МК-1219.2020.3; by Russian Foundation for Basic Research and the government of the Novosibirsk region of the Russian Federation, grant № 18–43–540016 r_a

Temperature and excitation wavelength dependent emission of silver(I) complexes with an aminopyrimidine ligand

The research was supported by the President of the Russian Federation Grant for young scientists МК-1219.2020.3; by Russian Foundation for Basic Research and the government of the Novosibirsk region of the Russian Federation, grant № 18–43–540016 r_a