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

Authors

  • Ye. Lobanov O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine
  • G. Nikitsky "LLC RPE LTU"
  • O. Petchenko O.M. Beketov National University of Urban Economy in Kharkiv
  • G. Petchenko O.M. Beketov National University of Urban Economy in Kharkiv

Keywords:

ionic crystals, color centers, optical absorption method, transmittance, volume concentration of F-centers, attenuation spectral index, optical absorption bands, refractive index, reflection coefficient, radiation flux.

Abstract

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.

References

[1] V.M. Lisitzyn. Radiation solid state physics. Tomsk: “Izdatelstvo Tomskogo Politekhnicheskogo Universiteta”, 2008, 172 p. (in Russian).
[2] M.V. Galustashvili, M.G. Abramishvili, D.G. Driaev, V.G. Kvachadze. Effect of magnetic field on the radiation hardening LiF crystals // FTT. 2011, N 53(7), p. 1340-1342.
[3] T. Klempt, S. Schweiser, K. Schwartz, et al. Magnetic resonance unvestigation of the dynamics of F centers in LiF // Solid State Communications. 2001, N 119, p. 453-458.
[4] A. Smakula. Uber Erregung und Entfarbung lichtelektrisch leitender Alkalihalogenide // Z. Physik. 1930, N 9-10 (59), р. 603-614.
[5] А. Smakula, P. Avakian. Color centers in cesium halide single crystals // Phys. Rev. 1960, N 6, p. 2007-2014.
[6] D.L. Dexter. Absorption of light by atoms in solids // Phys. Rev. 1956, N 101, p. 48-55.
[7] G.A. Petchenko, S.S. Ovchinnikov. Effect of the preliminary deformation and irradiation on the optical absorption in LiF crystals // Problems of Atomic Science and Technology. Series “Physics of Radiation Effect and Radiation Materials Science”. 2014, N 2(90), p. 29-33.
[8] G.A. Petchenko, A.M. Petchenko. Dependence of electronic color center concentration on the state of irra-diated LiF crystal dislocation structure // Problems of Atomic Science and Technology. Series “Physics of Ra-diation Effect and Radiation Materials Science”. 2015, N 2(96), p. 25-28.
[9] М.М. Gurevich. Photometry (Theory, methods and devices), L.: “Ehnergoatomizdat”, 1983, 272 p.
[10] V.V. Meshkov, The basics of lightning engineering, М.: «Energiya», 1979, 368 p.
[11] A.M. Petchenko, G.A. Petchenko. Features of resonance absorption of longitudinal ultrasound in strained crystals KBr at temperature variations // Functional Materials. 2007, V. 14, № 4, P. 475 – 479.
[12] G.A. Petchenko, A.M. Petchenko. Effect of crystal pre-straining on phonon damping of dislocations // Functional Materials. 2008, V. 15, № 4, P. 481 – 486.
[13] O.M. Petchenko, G.O. Petchenko. Phonon drag of dislocations in KCl crystals with various dislocation structure states // Ukrainian journal of physics. 2010, V. 55, №. 6, P. 716 – 721.
[14] R. Truell, Ch. Elbaum, B. Chik. Ultrasound methods in solid state physics. Moskva: “Mir”, 1972. 307 p.
[15] A.A. Botaki, A.A. Vorobev, V.A. Ulyanov, Radiation physics of ionic crystals, М.: Аtomizdat, 1980. – 208 p.

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Published

2020-11-27

How to Cite

Lobanov, Y., Nikitsky, G., Petchenko, O., & Petchenko, G. (2020). The Essence and Application of the Optical Absorption Method for Quantitative and Qualitative Analysis of Radiation Defects in Optical Crystals. Lighting Engineering & Power Engineering, 3(59), 97–100. Retrieved from https://lepe.kname.edu.ua/index.php/lepe/article/view/449

Issue

Vol. 3 No. 59 (2020): Lighting Engineering & Power Engineering

Section

Articles

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