Title :
Radiation damage of pure and doped KMgF3 crystals
Author :
Gektin, A.V. ; Komar, V.K. ; Shiran, N.V. ; Shlykhturov, V.V. ; Nesterenko, N.P. ; Krasovitskaya, I.M. ; Kornienko, V.V.
Author_Institution :
Inst. for Single Crystals, Kharkov, Ukraine
fDate :
8/1/1995 12:00:00 AM
Abstract :
The radiation damage nature of pure and doped KMgF3 crystals was studied on the basis of the absorption, emission, excitation and thermoluminescence (TL) spectra. It is shown that the sensitivity of this material to the ionizing irradiation is defined not only by its own color centers but by the presence of oxygen impurities too. The availability of oxygen in KMgF3 is revealed in additional absorption and emission bands, high temperature (T>400°C) peaks of TL, UV-energy storage. From the RE doped KMgF 3 crystals the most illustrative results were obtained for EuF3 and Eu2O3 doped samples. High emission efficiency corresponds to the f-f transitions in Eu2+ ions. The trap structure is connected with intrinsic point defects and oxygen impurity contents. The most intensive TL-peak is at 390°C and in crystals with Eu2O3 it´s in many times higher than in those with EuF3. It is shown that KMgF3:Eu2O3 is an effective dosimeter not only for X-ray but for UV-registration too
Keywords :
X-ray detection; X-ray effects; colour centres; defect absorption spectra; dosimeters; europium compounds; impurity absorption spectra; magnesium compounds; point defects; potassium compounds; radiation effects; radiation monitoring; scintillation; solid scintillation detectors; thermoluminescence; thermoluminescent dosimeters; visible spectra; 390 C; KMgF3:Eu2O3; KMgF3:EuF3; O impurities; UV-energy storage; UV-registration; X-ray registration; absorption spectra; color centers; dosimeter; emission spectra; excitation spectra; high temperature peaks; intrinsic point defects; ionizing irradiation; radiation damage; scintillation counter; thermoluminescence spectra; trap structure; Color; Crystalline materials; Crystals; Electromagnetic wave absorption; Energy storage; Heating; Impurities; Lapping; Luminescence; Temperature sensors;
Journal_Title :
Nuclear Science, IEEE Transactions on
