Influence of high reactor irradiation on some parameters of Al203 crystals and process generation of a several points nanodefects

Abstract

In this connection the peculiarities of radiation effect on lattice parameters, form and position of several reflections, reflection coefficient and frequency of valence and deformation oscillations of Al-O bonds, optical characteristics of the oxide aluminium Al2O3 were studied with techniques of X-diffraction, absortion-luminescenke and IRreflection spectroscopy. The characteristic features of the process of radiation-defect formation and generation of some points nanodefects, change in the structural, optical properties of Al2O3 crystals exposed to gamma and reactor radiation have been investigated by spectroscopic methods. The dose dependence’s of the generation in crystals the color and luminescence centers, nanodefects - type F- and F-aggregate, change of the structural parameters was determined. For example, in work presented of temperaturedose dependence on the intensity of the 330, 420 nm bands in FL and GL spectrum of crystals. As the T= 600-7000C and fluence 1.1016 cm-2 - 1.1019 cm-2 of intensity this bands increasing (nanodefects - F+ centers) was can see. In this paper was given dose dependence of generation on the oxide in the absorption spectra a bands 257 and 358 nm (nanodefects of a type F- and F-aggregate defects). The possible mechanism of damage structure of a samples irradiated in a reactor is discussed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20873