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2 edition of Optimization of an energy dispersive x-ray diffraction system via GEANT4 simulations found in the catalog.

Optimization of an energy dispersive x-ray diffraction system via GEANT4 simulations

Peiying Zhao

Optimization of an energy dispersive x-ray diffraction system via GEANT4 simulations

by Peiying Zhao

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  • 29 Currently reading

Published by Laurentian University, School of Graduate Studies in Sudbury, Ont .
Written in English


Edition Notes

Statementby Peiying Zhao.
SeriesCanadian theses = Thèses canadiennes
The Physical Object
Paginationxii, 100 l. :
Number of Pages100
ID Numbers
Open LibraryOL22261820M
ISBN 1097800494239674

  Energy-dispersive X-ray spectroscopy (EDS, EDX, or XEDS), sometimes called energy dispersive X-ray analysis (EDXA) or energy dispersive X-ray microanalysis (EDXMA), is an analytical technique used. X-ray tube F+/-ure 1. Block diagram of the energy-dispersive x-ray diffraction system used in this work. Tracor ). As the recording system an x-y scope, a printer and a tape punch were used. The Bragg equation can be writ-ten, in the case of the cubic system, by the expression E 6"(h2 + k2 + 12)1/2 a sin 8 (7) where E is the energy of the.

amplifier and finally passed to a computer x-ray analyzer (CXA), where the data is displayed as a histogram of intensity by voltage (energy). • The key to understanding how an energy-dispersive X-ray spectrometer (EDS) works is to recognize that each voltage pulse is proportional to the energy of the incoming x-ray photon. Energy-dispersive X-ray diffraction using an annular beam energy dispersive X-ray diffraction (EDXRD) system and its use in the simulation of experimentally derived diffraction profiles,” Nucl. Instrum. Methods Phys. Res., Sect. A (), – (). B. Ghammraoui, V. Rebuffel, J. Tabary, C. Paulus, L. Verger, and P.

We have developed x-ray diffraction measurements with high energy-resolution and accuracy to study water structure at three different temperatures (7, 25 and 66 C) under normal pressure. Using a spherically curved Ge crystal an energy resolution better than 15 eV has been achieved which eliminates influence from Compton scattering.   Although the energy dispersive x-ray diffraction (EDXD) technique has proved to have several merits in comparison with its conventional angular dispersive counterpart, it has the serious drawback that its resolution is intrinsically lower than that of the latter. This makes EDXD unsuitable each time that high-resolution measurements are needed. However, a wide class of samples does not .


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Optimization of an energy dispersive x-ray diffraction system via GEANT4 simulations by Peiying Zhao Download PDF EPUB FB2

The optimization of an energy-dispersive X-ray diffraction system for potential clinical application. In a high sensitivity system, recording a diffraction pattern with definite peak height needs shorter measurement time in comparison with a low sensitivity by: Measurements of breast tissue scattering properties have been made in an energy dispersive x-ray diffraction system over the momentum transfer range of to.

Energy-dispersive X-ray diffraction (EDXRD) is an analytical technique for characterizing materials. It differs from conventional X-ray diffraction by using polychromatic photons as the source and is usually operated at a fixed angle. With no need for a goniometer, EDXRD is able to collect full diffraction patterns very is almost exclusively used with synchrotron radiation which.

Energy-dispersive X-ray spectroscopy (EDS, EDX, EDXS or XEDS), sometimes called energy dispersive X-ray analysis (EDXA) or energy dispersive X-ray microanalysis (EDXMA), is an analytical technique used for the elemental analysis or chemical characterization of a sample.

It relies on an interaction of some source of X-ray excitation and a characterization capabilities are due in. Energy-Dispersive X-ray Spectroscopy Energy-dispersive X-ray spectroscopy (EDS, EDX, or XEDS) is an analytical technique used for the elemental analysis or chemical characterization of a sample.

It relies on the investigation of an interaction of some source of X-ray excitation and a sample. TRI-AXIAL POLARIZED ENERGY DISPERSIVE X-RAY FLUORESCENCE AND ENERGY DISPERSIVE X-RAY DIFFRACTION SYSTEM FOR BIOLOGICAL SAMPLE CLASSIFICATION BY ERIC JOHNSTON, B.

A Sc. a thesis submitted to the department of Radiation Sciences and the school of graduate studies of mcmaster university in partial fulfilment of the requirements for the degree of. The main advantages of portable energy dispersive X‐ray diffraction systems compared with commonly used angle dispersive X‐ray diffraction (ADXRD) instruments are shorter measurement times and compactness.

Moreover, optimum XRF spectra can be collected because a polychromatic beam is used instead of a (quasi) monochromatic beam as in an. A system using energy dispersive X-ray diffraction has been tested to detect the presence of illicit drugs concealed within parcels typical of those which are imported into the UK via postal and courier services.

The system was used to record diffraction data from calibration samples of diamorphine (heroin) and common cutting agents and a partial least squares regression model was established. Energy Dispersive X Ray Diffraction to identify Explosive Substances: spectra analysis procedure optimization Crespy C.1, Duvauchelle P.1, Kaftandjian V.1,Soulez F.1, Ponard P.2 1CNDRI – Insa Lyon, Université de Lyon, F, Villeurbanne cedex, France 2Thales components and subsystems, 2 rue Marcel DassaultVelizy cedex, France.

AgNPs further examined the X-ray Diffraction (XRD) and Energy Dispersive Spectroscopy (EDS) analysis. The X-ray diffraction results clearly show that the silver nanoparticles formed by the reduction of Ag+ ions by the Erythrina indica flower extract are crystalline in nature.

The average crystalline size of AgNPs is calculated using. X-ray diffraction has been used for many years to study the structure of crystalline materials, generally by using angular dispersive diffraction measurements (ADXRD). A few years ago, energy dispersive X-ray diffraction (EDXRD) became a major tool, used both to detect illicit materials [1] as part of airline baggage control and in medical.

A system using energy dispersive X-ray diffraction has been tested to detect the presence of illicit drugs concealed within parcels typical of those which are imported into the UK via postal and. Characterization of a system that combines energy dispersive X-ray diffraction with X-ray fluorescence and its potential applications in archeometry Uda, “ In situ characterization of ancient plaster and pigments on tomb walls in Egypt using energy dispersive X-ray diffraction and fluorescence,” Nucl.

Instrum. The second approach is called Energy-Dispersive X-Ray Diffraction (EDXRD), it measures the scattering pattern at a fixed angle using polychromatic X-ray tubes and an energy-resolved detector. For this study, we chose to develop a material-specific imaging system based on an EDXRD configuration, taking advantage of the gain of one dimension.

In particular, it has been shown that energy-dispersive X-ray diffraction (EDXRD) combined with multivariate analysis for drug identification allows illegal drug identification [3].

The DILAX project is aimed at looking at the best options for a system for illicit drug identification using X-ray diffraction. Performance of hybrid angle-energy dispersive X-ray diffraction and fluorescence portable system for non-invasive surface-mineral identification in Archaeometry.

Ariadna Mendoza Cuevas 1,† and Jorge Fernández-de-Cossio Dorta-Duque1,2 1 Archaeometry Laboratory at Havana Historian's Office, San Ignacio entre Obispo y Aguiar.

Energy dispersive X-ray diffraction (EDXRD) has great potential for application in the field of security inspection.

On the basis of the Bragg's diffraction law, an EDXRD system simulation model. Using a convergent collimation system and a spectroscopic imaging detector, the system combines energy dispersive X-ray diffraction (EDXRD) spectral information at different scattering angles.

A multi-angle EDXRD approach was suggested by other research teams [17], [18] and it was shown that this technique allows an increase of system. Energy Dispersive or Angle Dispersive. The DAC was originally used in the so-called angle dispersive diffraction (ADD) mode in which Bragg's Law, λ = 2d sinθ, is fulfilled by using a fixed X-ray wavelength, λ, and scanning in angle, θ: this mode has already been discussed many times in the course.

When intense near-parallel synchrotron X-rays became so readily available during the 's. Herein, we explore the lithiation of a multiple electron transfer conversion material, Fe 3 O 4, and report tomographic-like mapping of the electroactive material utilization under operando electrochemical lithiation using energy-dispersive X-ray diffraction.

The follow sections provide an overview of the instruments and methods involved in measuring X-ray diffraction using the angle- and energy-dispersive techniques. 20 – Angle-Dispersive X-ray Diffraction There are a number of different experimental setups in use that measure X-ray diffraction through angular dispersion.In this work, results of scattering experiments using monochromatized synchrotron radiation in the X-ray regime are quantitatively compared to the results of simulations using Geant4.Energy dispersive X-ray diffraction (EDXRD) with photons of high energy and high flux is used to map crystalline discharge products within alkaline AA cells following discharge at various rates: C.