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| Radiation Effects in Grained Quartz Crystals at Neutron-Irrigited Seeds |
Mustafakulov Asror Ahmedovich, Akhmadzhonova Umida Tozhimurodovna
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Abstract:
The work is devoted to the growth and study of quartz crystals on irradiated seeds in order to obtain new crystalline substances with given structural and radiation-optical characteristics. The results of studies of X-ray diffraction analysis, photo-gamma-thermoluminescence of crystals after neutron and gamma irradiation are presented. The fraction of the volume of quartz crystals coated with "mixing peaks" at different neutron fluences was calculated, taking into account the attachment of point defects to them. The experimental data on the growth of crystals on irradiated seeds, on establishing the relationship between the structure of the seed and the characteristics of the overgrown layer is of great interest to specialists involved in the creation of materials with desired properties using radiation technologies. A study of the kinetics of the luminescence bands in unirradiated and neutron-irradiated crystals in the temperature range 77-300K revealed luminescence bands 420, 490, 550, 660 nm. The dependence of the intensities of the luminescence bands on the dose of neutron seed irradiation, additional neutron irradiation was determined, and the thermal stability regions of these luminescence centers were determined. It was found that in neutron-irradiated seeds and quartz crystals grown on them, defect centers belonging to the ß - phase of quartz exist. The dependences of the concentration of these centers and the ß phase on the neutron fluence correlate well with each other.
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