Effect of a magnetic field on radiation strengthening of LiF crystals

Galustashvili, M. V.; Abramishvili, M. G.; Driaev, D. G.; Kvachadze, V. G.

doi:10.1134/s1063783411070122

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…The essence and application of the absorption optical method for quantitative and qualitative analysis of defects of radiation origin in solids are described in [1][2][3][4][5][6][7][8]. Articles [1][2][3][4][5][6][7][8] demonstrate the results of using the method for the study of radiation defects in ionic crystals.…”

Section: Essence and Justification Of The Absorption Optical Methodsmentioning

confidence: 99%

“…A well-known absorption method is used to identify and analyze existing defects of radiation origin in ionic crystals [1][2][3][4][5][6][7][8].…”

Section: Essence and Justification Of The Absorption Optical Methodsmentioning

confidence: 99%

“…It is known today [1][2][3][4][5][6][7][8] that ionic crystals have found wide application in optics (crystal monochromators in Xray spectral optics, lenses, transparent optical media (light filters) of optical instruments), in detector and laser technology. It is known that when ionizing radiation passes through ionic crystals, color centers appear in them, which can change the spectral composition of radiation both in the UV region and in the visible range.…”

Section: Optical Functional Materials Their Application In Devicesmentioning

confidence: 99%

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The Essence and Application of the Optical Absorption Method for Quantitative and Qualitative Analysis of Radiation Defects in Optical Crystals

Lobanov

Nikitsky²,

Petchenko

et al. 2020

LEPE

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Today ionic crystals are widely used in devices for various purposes. In X-ray spectral optics they are widely used as crystal monochromators; ionic crystals are used in optical devices where lenses and transparent optical media (light filters) are made of optically pure materials - ionic crystals. In general, the main positive feature of these materials is transparency regarding the transmission of radiation in the visible region of the spectrum (transmittance of about 0.9) and neutrality - that is, approximately the same reaction of the medium to different spectral ranges of radiation. Ionic crystals are also widely used in detectors (scintillators, ionizing radiation dosimeters) and lasers. They are also widely used in acousto-optics and electrical engineering (lines of electrical signals delay, which gain efficiency due to the relatively small absorption of ultrasonic waves, and, therefore, it is possible to work with a wide sequence of signals probing the crystal). It is known that when ionizing radiation passes through ionic crystals, color centers appear in them, which can change the spectral composition of radiation both in the UV region and in the visible range. For example, the simplest configurations of color centers (F-centers) lead to the appearance in optical materials of additional absorption bands localized on the wavelength axis with a maximum at the wavelength lmax = 248 нм , but more complex configurations of radiation damage in solids already lead to the appearance of absorption bands at wavelengths in the visible range. This already presents some difficulties for developers and designers of relevant equipment, as changes in the spectral composition of radiation passing through the optical system of the device can lead, for example, to loss of efficiency of the selected radiation receiver, the main characteristic of which is primarily spectral sensitivity. Taking into account possible changes in the spectral composition of radiation is an important and urgent task of modern optical instrumentation. The purpose of this work is the analysis and justification of a method that takes into account structural changes in externally irradiated ionic crystals.

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Section: Essence and Justification Of The Absorption Optical Methodsmentioning

confidence: 99%

“…A well-known absorption method is used to identify and analyze existing defects of radiation origin in ionic crystals [1][2][3][4][5][6][7][8].…”

Section: Essence and Justification Of The Absorption Optical Methodsmentioning

confidence: 99%

Section: Optical Functional Materials Their Application In Devicesmentioning

confidence: 99%

See 1 more Smart Citation

The Essence and Application of the Optical Absorption Method for Quantitative and Qualitative Analysis of Radiation Defects in Optical Crystals

Lobanov

Nikitsky²,

Petchenko

et al. 2020

LEPE

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show abstract

“…Summing up the consideration of the results obtained by the method of amplitude-independent internal friction, we should note the recent papers [119,120], in which the optical method [121][122][123][124][125][126] was used simultaneously with the above mentioned one, which made it possible to determine the nature of x-ray pinning centers in the crystals under study.…”

Section: Nacl Lg Merkulov Research Group [6264]mentioning

confidence: 99%

The Main Results' Overview Obtained by the Method of Amplitude-Independent Internal Friction on Metals and Ionic Crystals

Petchenko¹,

Петченко²,

Boiko³

2019

Problems of Atomic Science and Technology

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There was made the analysis of the main findings obtained in the field of the dislocations' dynamics research using the method of amplitude-independent internal friction on different objects of study – metals and alkali-halide crys-tals. The results of Granato-Lücke string dislocation theory verification, as well as of Alshits-Indenbom quantum-mechanical theory of dynamic dislocations' damping for above-mentioned materials were considered in the paper. An analytical review of works aimed at the study of relaxation and thermally activated processes in crystals was performed here. Some promising directions for the further experimental work on this problematics there were re-vealed as a result of the study.

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“…-Т/ with experimental data for crystal KBr ( -  0,23 %, ,,  -data for crystals with deformations   0,5, 0,75 and 1 % respectively); the curve 1 is the Alschyts-Indenbom's theoretical curve calculated according to the experimentally determined phenomenological parameter of the theory е, line 2 is the high-temperature asymptote through which е is determined The paper [5] presents the results of systematic investigations of the radiation defects' nature that arise under the action of X-ray irradiation in the range of doses 0-1057 R. The authors [5] aimed to determine the type of radiation defects, track the dynamics of their formation in irradiated specimens and determine the effect of the samples' dislocation structure on the type and number of radiation defects. For this purpose the authors used the optical absorption method, widely utilized in optical radiation material science, as an instrument for the identification of radiation defects in solids [6][7][8][9][10]. Its essence is to study and analyze the spectral dependences of the transmission coefficient   () for irradiated crystals.…”

Section: Fig 4 -Comparison Of the Combined Temperature Course B(t)/b()mentioning

confidence: 99%

Empirical Regularities of Change in Dynamic, Acoustic, Structural, Optical and Colorimetric Characteristics of Ionic Crystals with Debye Temperature

Petchenko¹,

Петченко²,

Boiko³

2018

J. Nano- Electron. Phys.

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The paper deals with the possibly establishing a hierarchy of phonon mechanisms of dislocations' attenuation at the Debye temperature in the investigated crystal. For the first time, the reproduction technology of dislocation absorption's frequency spectra of ultrasound in crystals at a known Debye temperature was demonstrated, as well as an algorithm for switching from thermal to structural, dynamic, acou stic, optical and colorimetric characteristics of crystals. There were studied the influence of structural defects of a crystal, in particular, nodes of a dislocation grid and pinning centers in the dislocations of different physical nature on the proposed empirical regularities, and the expediency of their use for samples of ionic crystals with different mechanical states was also grounded.

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Effect of a magnetic field on radiation strengthening of LiF crystals

Cited by 10 publications

References 2 publications

The Essence and Application of the Optical Absorption Method for Quantitative and Qualitative Analysis of Radiation Defects in Optical Crystals

The Essence and Application of the Optical Absorption Method for Quantitative and Qualitative Analysis of Radiation Defects in Optical Crystals

The Main Results' Overview Obtained by the Method of Amplitude-Independent Internal Friction on Metals and Ionic Crystals

Empirical Regularities of Change in Dynamic, Acoustic, Structural, Optical and Colorimetric Characteristics of Ionic Crystals with Debye Temperature

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