Dependence of X-ray plane-wave rocking curves on the deviation from exact Bragg orientation in and perpendicular to the diffraction plane for the asymmetrical Laue case

2018 ◽  
Vol 74 (3) ◽  
pp. 204-215 ◽  
Author(s):  
Minas K. Balyan
Keyword(s):  
Plane Wave ◽  
Absorption Coefficient ◽  
Wave Transmission ◽  
Reflection Coefficients ◽  
Effective Absorption Coefficient ◽  
Diffraction Plane ◽  
X Ray ◽  
Transmission And Reflection Coefficients ◽  
Effective Absorption ◽  
Transmission And Reflection

For the asymmetrical Laue case the X-ray plane-wave transmission and reflection coefficients and rocking curves are analysed as a function of the deviation angles from the exact Bragg orientation in the diffraction plane and in the direction perpendicular to the diffraction plane. New peculiarities of the rocking curves are obtained. The peculiarities of both the effective absorption coefficient and rocking curves in thick crystals are also investigated.

Dependence of X-ray asymmetrical Bragg case plane-wave rocking curves on the deviation from exact Bragg orientation in and perpendicular to the diffraction plane

2019 ◽  
Vol 75 (3) ◽  
pp. 517-526
Author(s):  
Minas K. Balyan
Keyword(s):  
Plane Wave ◽  
Size Dependence ◽  
Wave Reflection ◽  
Total Reflection ◽  
Reflection Coefficients ◽  
Rocking Curve ◽  
Diffraction Plane ◽  
X Ray

For the asymmetrical Bragg case the X-ray plane-wave reflection coefficients and rocking-curve dependences on the deviation angles from the exact Bragg orientation in the diffraction plane and in the direction perpendicular to the diffraction plane are analysed. The region of total reflection and its size dependence on two deviation angles are analysed as well. New peculiarities of the rocking curves are obtained.

Plane Wave Visualisation on a Dielectric-Dielectric Interface

2003 ◽  
Vol 40 (2) ◽  
pp. 112-122
Author(s):  
Mohammed H. Bataineh
Keyword(s):  
Plane Wave ◽  
Boundary Conditions ◽  
Three Dimensional ◽  
Brewster Angle ◽  
Reflection Coefficients ◽  
Dielectric Interface ◽  
Matlab Code ◽  
Transmission And Reflection Coefficients ◽  
Contour Plots ◽  
Transmission And Reflection

In this paper, the behaviour of an arbitrarily polarised plane wave on a dielectric-dielectric interface is investigated. By imposing the appropriate boundary conditions the Fresnel transmission and reflection coefficients are derived. Using these coefficients various three dimensional as well as contour plots are produced using a MATLAB code in order to illustrate the refraction and the reflection usually encountered at an interface. Snell's law and the Brewster angle are discussed within the context of the analysis.

Investigation of Lithium Precipitates in Germanium Crystals by Anomalous X-Ray Transmission

1971 ◽  
Vol 26 (3) ◽  
pp. 495-501 ◽  
Author(s):  
Helmut F. Wenzl
Keyword(s):  
Phase Diagram ◽  
Absorption Coefficient ◽  
Local Concentration ◽  
X Rays ◽  
Effective Absorption Coefficient ◽  
Pair Correlations ◽  
X Ray ◽  
Effective Absorption ◽  
Anomalous Transmission ◽  
Distortion Parameters

Abstract The precipitation of lithium dissolved in germanium crystals and the re-solution of the precipitates during heating has been studied by means of anomalous transmission of x-rays. The effective absorption coefficient depends sensitively on the spacial distribution of lithium interstitials, and is enhanced enormously if pair correlations increase, as is the case during clustering. On the basis of Dederidis' theory and knowledge about the Geli phase diagram, the experiments provide relations between concentration and radius of the precipitates, distortion parameters, and average and local concentration of lithium interstitials.

scholarly journals TECHNOLOGY OF MANUFACTURE OF RADIO ABSORPTION CERAMICS

2021 ◽  
pp. 9-14
Author(s):  
George Lisachuk ◽  
Ruslan Kryvobok ◽  
Artem Zakharov ◽  
Valentyna Voloshchuk ◽  
Mykyta Maistat ◽  
...  
Keyword(s):  
Raw Materials ◽  
Spectral Characteristics ◽  
Raw Material ◽  
Reflection Coefficients ◽  
Frequency Range ◽  
Press Powder ◽  
X Ray ◽  
Transmission And Reflection Coefficients ◽  
Hydrostatic Weighing ◽  
Transmission And Reflection

The object of the work is the technology of manufacturing radio-absorbing ceramics on the basis of facing tiles with the addition of silicon carbide. The method of hydrostatic weighing in water was used to determine the physical properties. X-ray phase analysis and spectral characteristics - transmission and reflection coefficients, in the frequency range 25.8 – 37.5 GHz were also determined. Tiles consist of two layers. First, separately obtain a press powder for the I and II layer of raw materials in a given amount, which were weighed, moistened, ground in a ball mill; the slip was dried in an oven, then ground and passed through a suitable sieve. The moistened press powder for the first layer was weighed and poured into a mold for pressing, after which the moistened press powder for the second layer was weighed and poured into the mold for pressing. The resulting raw material was dried. The semi-finished product was covered with watering and placed in an oven. The finished semi-finished product was fired in a silite furnace. The two-layer tile with an irrigated covering made on the developed technology was characterized by the following characteristics: water absorption – 9,8 %, imaginary density – 1,90 g/cm3. The developed ceramics, according to the classification, can be referred to the class of radio-absorbing ceramics.

scholarly journals Transmission, Reflection and Dissipation of Microwaves in Magnetic Composites with Nanocrystalline Finemet-Type Flakes

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3499
Author(s):  
Anatoly B. Rinkevich ◽  
Dmitry V. Perov ◽  
Yuriy I. Ryabkov
Keyword(s):  
Composite Material ◽  
Microwave Absorption ◽  
Nanocrystalline Alloy ◽  
Reflection Coefficients ◽  
Magnetic Composites ◽  
Transmission And Reflection Coefficients ◽  
Wave Interference ◽  
Microwave Losses ◽  
Frequency Dependences ◽  
Transmission And Reflection

The microwave properties of a composite material containing flakes of finemet-type nanocrystalline alloy placed in the epoxy matrix have been investigated. Two compositions have been studied: with 15% and 30% flakes. Frequency dependences of transmission and reflection coefficients are measured in the frequency range from 12 to 38 GHz. The dielectric permittivity and magnetic permeability are obtained, and the microwave losses are calculated. The dependences of transmission and reflection coefficients have been drawn as functions of wave frequency and thickness of the composite material, taking into account the frequency dependences of permittivity and permeability. The regions of maximal and minimal microwave absorption have been defined. The influence of wave interference on the frequency dependence of microwave absorption is studied.

DKP equation with smooth barrier

2021 ◽  
Author(s):  
O. Langueur ◽  
M. Merad ◽  
A. Rassoul
Keyword(s):  
Hypergeometric Function ◽  
Numerical Study ◽  
Confluent Hypergeometric Function ◽  
Reflection Coefficients ◽  
Step Potential ◽  
Dkp Equation ◽  
Transmission And Reflection Coefficients ◽  
Special Cases ◽  
Rectangular Barrier ◽  
Transmission And Reflection

In this paper, we study the Duffin–Kemmer–Petiau (DKP) equation in the presence of a smooth barrier in dimensions space–time (1+1) dimensions. The eigenfunctions are determined in terms of the confluent hypergeometric function [Formula: see text]. The transmission and reflection coefficients are calculated, special cases as a rectangular barrier and step potential are analyzed. A numerical study is presented for the transmission and reflection coefficients graphs for some values of the parameters [Formula: see text] are plotted.

Materials Evaluation and Environmental Monitoring Utilizing an Acoustic Resonance

2020 ◽  
Author(s):  
Hironori Tohmyoh
Keyword(s):  
Resonant Frequency ◽  
Environmental Monitoring ◽  
Water Film ◽  
Acoustic Resonance ◽  
Acoustic Properties ◽  
Reflection Coefficients ◽  
Plate Interface ◽  
Transmission And Reflection Coefficients ◽  
Transmission And Reflection ◽  
Outer Environment

Abstract This paper presents the materials evaluation and environmental monitoring techniques utilizing the acoustic resonance, which have been developed by the authors. When the ultrasound passes through thin layer, the transmission and reflection coefficients take their maximum and the minimum values at the resonant frequency. We call this acoustic resonance. The acoustic properties of a polymer film, e.g., the acoustic impedance, ultrasonic velocity, and density, can be determined by observing the acoustic resonance, which occurs at the water/film/reflection plate interface. Acoustic resonance occurs at the reflection plate/film/outer environment interface sensitively changes depending on the outer environment. With use of this, the temperature of the water as an outer environment is tried to be monitored.

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