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Spectral characteristics and force constants of irradiated α-SiO2 single crystals

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Abstract

The IR-radiation reflectance spectra of α-SiO2 single crystals exposed, in a reactor, to fast neutrons with fluences changing in a wide range have been investigated. The regularities of the change in spectral characteristics of the antisymmetric and degenerate vibrations of the bridge bonds of the crystals studied and in the dynamic parameters of these crystals in the process of their irradiation have been determined. The critical dynamics of the crystal lattice in the region of antisymmetric stretching and degenerate modes and the extremum radiation kinetics of the ion-polarizability parameters and the force constants of the indicated crystals were detected. The changes in some characteristics of these crystals, arising on their irradiation as a result of the damage of the substance, the rupture and extension of some silicon—oxygen bonds, and the transformation of the structure of α-SiO2 single crystals by two mechanisms, have been considered.

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Authors and Affiliations

  1. Institute of Nuclear Physics, Academy of Sciences of Uzbekistan, Ulugbek Poselok, Tashkent, 702132, Republic of Uzbekistan

    I. Kh. Abdukadyrova

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  1. I. Kh. Abdukadyrova
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 6, pp. 773–777, November–December, 2005.

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Abdukadyrova, I.K. Spectral characteristics and force constants of irradiated α-SiO2 single crystals. J Appl Spectrosc 72, 848–852 (2005). https://doi.org/10.1007/s10812-006-0014-3

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  • DOI: https://doi.org/10.1007/s10812-006-0014-3

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