Light element depth distribution by the intensity ratio of incoherent and coherent scattering

Mikhailov, I. F.; Baturin, A. A.; Mikhaǐlov, A. I.; Knyazev, S. A.

doi:10.1002/xrs.3033

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…The uniqueness of this method lies in the fact that it is suitable for the rapid identification of elements with a small atomic number down to hydrogen ( Z = 1) with tables . Recently, the ratio of Compton and Rayleigh scattering intensities has been used in solving both fundamental problems of determining the effective atomic number and mass absorption coefficients and applied problems of adjusting the composition in the XRF analysis, and also for determining the fraction of light elements in the sample bulk and the distribution of light elements along its depth . In our previous work, it was shown that the

\frac{true}{I_{C}}

dependence on the atomic number can be used as a calibration function for identification of single‐component and binary materials in certain ranges of effective atomic numbers Zeff .…”

Section: Introductionmentioning

confidence: 99%

Determination of binary systems based on light elements by the ratio of the Compton and Rayleigh scattering intensities

Mikhailov¹,

Baturin

Mikhaǐlov

et al. 2020

X-Ray Spectrometry

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A generalization of the Compton method for determining elements with a low atomic number Z from 1 (H) to 9 (F) by the ratio trueICIR of the intensities of incoherent (Compton) and coherent (Rayleigh) scattering is proposed. The generalization takes into account not only the dependence of this ratio on the effective atomic number of the scatterer material but also the momentum transfer variable x = sin0.5emθλ. The new method is based on the application of calibration function of trueICIR=g()Z,x obtained by measuring scattering spectra at two values of x1= 0.831 Å−1 and x2= 1.297 Å−1 with a WDXRF spectrometer. The elemental atomic numbers and their concentrations of binary compounds with unknown compositions are determined by the solution of a system of linear equations. Coefficients of the equations are calculated from the measured trueICIR ratios for the test sample and the regularization solution for the corresponding calibration. The experiments have been carried out for standard samples of single‐component, binary and triple stoichiometric compounds based on H, Li, Be, B, C, O and F. The identification of these elements was found to be possible in the absence of a relationship between the positions of scattering peaks and the composition of the sample, and a qualitative and quantitative analysis of the composition of the material was carried out as part of the solution of a single inverse problem.

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\frac{true}{I_{C}}

dependence on the atomic number can be used as a calibration function for identification of single‐component and binary materials in certain ranges of effective atomic numbers Zeff .…”

Section: Introductionmentioning

confidence: 99%

Determination of binary systems based on light elements by the ratio of the Compton and Rayleigh scattering intensities

Mikhailov¹,

Baturin

Mikhaǐlov

et al. 2020

X-Ray Spectrometry

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X-ray analysis of materials by the ratio of the intensities of incoherent and coherent scattering

2020

Funct.Mater.

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Investigation of metal non-opaque foreign bodies of firearm origin by radiation methods

Khoroshun,

Makarov,

Nehoduiko

et al. 2024

ЕМ

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Background. The purpose is to investigate metal non-opaque foreign bodies of firearm origin. Materials and methods. Five cases of removing soft tissue foreign bodies of gunshot origin were investigated, when radiography of the limb soft tissues didn’t detect foreign bodies, but they were removed during the primary surgical wound debridement. X-ray of soft tissue gunshot wounds found no foreign bodies. To study radiographic density, foreign bodies were placed in a foam model with subsequent multislice computed tomography. For spectral analysis of metal foreign bodies, we used wavelengths unconventional for X-ray, which allowed to conduct X-ray fluorescence and X-ray structural studies. Results. Radiographic density of metal foreign bodies ranged from 989 to 2123 HU. Given the different thickness of foreign bodies, from 0.4 to 3.2 mm, the average was 1700 ± 189 HU. The foam had radiographic density of –969 HU with model dimensions of 200 × 100 × 50 mm. When examining samples of foreign bodies, it was found that they are deformed, have different thicknesses. One of the samples is light and smooth on one side, and dark and rough on the other. X-ray fluorescence results: composition on the light side (% by mass): Al — base, Mn — 0.8, Fe — 0.3, Zn — 0.1, Cr — 0.05, Ti — 0.2, corresponding to Al-Mn alloy. The dark side is an oxidized Al-Mn alloy. In the spectrum of the dark side of the sample, the Br-Kα line was detected, which indicates the participation of bromine compounds in the oxidation process. From the smooth side of the sample, the spectrum of this line is not determined. Conclusions. Non-opaque metal foreign bodies of gunshot origin are a rare phenomenon. Metal foreign bodies with low radiographic density are non-ferromagnetic, the use of modern magnetic surgical instruments will not be effective. Visualization of metal foreign bodies, which are not determined by radiography, is possible with the help of multislice computed tomography. The use of the wavelength of primary radiation, which is unconventional for X-ray spectral analysis, and original X-ray optical schemes allows for quantitative determination of the composition and structure of any metal foreign bodies.

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Light element depth distribution by the intensity ratio of incoherent and coherent scattering

Cited by 3 publications

References 16 publications

Determination of binary systems based on light elements by the ratio of the Compton and Rayleigh scattering intensities

Determination of binary systems based on light elements by the ratio of the Compton and Rayleigh scattering intensities

X-ray analysis of materials by the ratio of the intensities of incoherent and coherent scattering

Investigation of metal non-opaque foreign bodies of firearm origin by radiation methods

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