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  1. No Access

    Article

    Effect of the Bending of Reflection Planes in Crystals on the Propagation of an Anomalous Wave in X-ray Diffraction

    The effect of the bending of reflection planes in crystals on the propagation of an anomalous wave in X‑ray diffraction has been studied by numerical-simulation methods. It is established that bending sign of ...

    I. A. Smirnova, E. V. Suvorov in Journal of Surface Investigation: X-ray, S… (2024)

  2. No Access

    Article

    Section Methods of X-Ray Diffraction Topography

    X-ray topography is a group of methods for obtaining diffraction images of structural defects in crystals. Among them, section topography techniques are distinguished by their abilities in acquiring quantitati...

    I. L. Shul’pina, E. V. Suvorov, I. A. Smirnova, T. S. Argunova in Technical Physics (2023)

  3. No Access

    Article

    On the Theory of X-ray Diffraction Interferometry in Single Crystals. Peculiarities of Effect and Possibilities of Application

    A new version of X-ray diffraction interferometer in a single crystal is studied theoretically. This device is similar to the Young interferometer with two slits, but, instead of slits, it is proposed to use a...

    V. G. Kohn, I. A. Smirnova in Crystallography Reports (2022)

  4. No Access

    Article

    Features of the Formation of Bending Interference Bands on X-Ray Section Topograms in the Bragg Geometry

    In the present work the features of the formation of interference deformation bands on uniformly curved crystals are investigated by the methods of section topography and numerical modeling in the Bragg geomet...

    E. V. Suvorov, I. A. Smirnova in Journal of Surface Investigation: X-ray, S… (2021)

  5. No Access

    Article

    X-Ray Diffraction Interferometer with One Slit: Computer Simulations and Analytics

    A theoretical basis and a method of accurate computer simulations for studying the properties of X-ray diffraction interferometer with one slit are formulated. The slit serves as a secondary source of coherent...

    V. G. Kohn, I. A. Smirnova in Crystallography Reports (2021)

  6. Article

    Open Access

    Nanodomain structure of single crystalline nickel oxide

    In this work we present a comprehensive study of the domain structure of a nickel oxide single crystal grown by floating zone melting and suggest a correlation between point defects and the observed domain str...

    B. Walls, A. A. Mazilkin, B. O. Mukhamedov, A. Ionov, I. A. Smirnova… in Scientific Reports (2021)

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  7. No Access

    Article

    Theory of the Laue Diffraction of X Rays in a Thick Single Crystal with an Inclined Step on the Exit Surface. I: Numerical Solution

    A method for computing the Laue diffraction of an X-ray spherical wave in a single crystal with an inclined step on the exit surface has been developed. The method is based on the use of two approaches to solv...

    V. G. Kohn, I. A. Smirnova in Crystallography Reports (2020)

  8. No Access

    Article

    Theory of the Laue Diffraction of X Rays in a Thick Single Crystal with an Inclined Step on the Exit Surface. II: Analytical Solution

    The analytical solution of the problem of the Laue diffraction of an X-ray spherical wave in a single crystal with an inclined step on the exit surface has been obtained. The general equations are used for the...

    V. G. Kohn, I. A. Smirnova in Crystallography Reports (2020)

  9. No Access

    Article

    Mathematical Modeling of Spot Dynamics in a Stratified Medium

    The investigation of dynamics of mixed fluid spots in a stratified environment is of interest both for the study of the ocean fine structure and for the study of wake dynamics behind moving underwater objects....

    V. A. Gushchin, I. A. Smirnova in Computational Mathematics and Mathematical Physics (2020)

  10. No Access

    Article

    Forming an Edge Dislocation Image at Anomalous X-ray Transmission

    The features of forming section and projection topography images of an edge dislocation normal to the crystal surface are considered for the case of X-ray anomalous transmission. Experimental images are analyz...

    I. A. Smirnova, E. V. Shulakov, E. V. Suvorov in Physics of the Solid State (2019)

  11. No Access

    Article

    Spectrometer of Synchrotron Radiation Based on Diffraction Focusing a Divergent Beam Formed by a Compound Refractive Lens

    The results of the first experimental realization of a spectrometer based on the effect of diffraction focusing of X rays by a flat single crystal are discussed. A secondary X-ray source with a relatively high...

    V. G. Kohn, I. A. Smirnova, I. I. Snigireva, A. A. Snigirev in Crystallography Reports (2018)

  12. No Access

    Article

    Experimental Observation of Delayed Impact-Ionization Avalanche Breakdown in Semiconductor Structures without p–n Junctions

    We have experimentally studied the dynamics of impact-ionization switching in semiconductor structures without p–n junctions when subnanosecond high-voltage pulses are applied. Silicon n+–n–n+ type structures and...

    V. I. Brylevskiy, I. A. Smirnova, N. I. Podolska… in Technical Physics Letters (2018)

  13. No Access

    Article

    A new high-sensitivity X-ray diffraction technique for determining local deformations of a crystal surface using “bending interference fringes”

    A new high-sensitivity X-ray diffraction technique for studying local surface deformations caused by crystal defects is described. The method is based on analysis of the shape of “bending interference fringes”...

    E. V. Suvorov, I. A. Smirnova in Technical Physics Letters (2016)

  14. No Access

    Article

    Peculiarities of section topograms for the multiple diffraction of X rays

    The distortion of interference fringes on the section topograms of single crystal due to the multiple diffraction of X rays has been investigated. The cases of the 220 and 400 reflections in a silicon crystal ...

    V. G. Kohn, I. A. Smirnova in Crystallography Reports (2016)

  15. No Access

    Article

    Determination of Elemental Composition of Precipitates Formed During Use of Petroleum Products by Flame Atomic Absorption Spectroscopy

    The results of studies on the development of the flame atomic absorption method for determining the elemental composition of precipitates formed during use of petroleum products are reported. The feasibility o...

    G. M. Balak, A. N. Privalenko… in Chemistry and Technology of Fuels and Oils (2016)

  16. No Access

    Article

    Analysis of nanosecond breaking of a high-density current in SOS diodes

    Effect of a sharp (nanosecond) breaking of the reverse current with a density on the order of 103–104 A/cm2 in a silicon diode upon switching from direct to reverse bias voltage (so-called silicon opening switch,...

    I. V. Grekhov, A. G. Lyublinskii, I. A. Smirnova in Technical Physics (2015)

  17. No Access

    Article

    A new enzyme preparation with high penicillopepsin activity based on the producer strain Penicillium canescens

    The producer of fungal penicillopepsin, an aspartate protease, has been created by genetic engineering. The biochemical and physicochemical properties of the penicillopepsin enzyme preparation obtained from th...

    I. A. Smirnova, A. S. Sereda, E. V. Kostyleva… in Applied Biochemistry and Microbiology (2015)

  18. No Access

    Article

    Anomalous dynamics of the residual voltage across a gallium-arsenide diode upon subnanosecond avalanche switching

    A qualitative difference between high-voltage gallium-arsenide diodes and similar silicon devices is found experimentally upon ultrafast switching in the delayed avalanche breakdown regime. It is shown that, f...

    V. I. Brylevskii, A. V. Rozhkov, I. A. Smirnova, P. B. Rodin… in Technical Physics Letters (2015)

  19. No Access

    Article

    A device for bending crystals in the process of an X-ray experiment

    A unit allowing one to bend single-crystal samples for studying distortions of crystal lattices on X-ray topograms is described. The crystals are bent in accordance with the four-bearing geometry scheme. The b...

    E. V. Suvorov, I. A. Smirnova, A. S. Obrazova in Instruments and Experimental Techniques (2015)

  20. No Access

    Article

    Subnanosecond avalanche switching in high-voltage silicon diodes with abrupt and graded p-n junctions

    The phenomenon of delayed avalanche breakdown in high-voltage silicon diodes has been studied for the first time using an experimental setup with specially designed resistive coupler as a part of a high-qualit...

    V. I. Brylevskii, I. A. Smirnova, P. B. Rodin, I. V. Grekhov in Technical Physics Letters (2014)

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