Feasibility Studies of EU+LI Co-Doped GD2O3 as a Thermo Luminescence Detector for UV Emission
Hristo Y. Hristov1, Valentin L. Velev2, Nikolay M. Uzunov3
1Hristo Y. Hristov, Asst. Prof., Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
2Valentin L. Velev, Asst. Prof., Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
3Nikolay M. Uzunov, Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
Manuscript received on 23 March 2015 | Revised Manuscript received on 30 March 2015 | Manuscript published on 30 March 2015 | PP: 29-31 | Volume-4 Issue-1, March 2015 | Retrieval Number: A1344034115©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: We have already studied the possibility to apply some sintered crystals such as ZrO2 doped with Er and Li as appropriate detectors for ultra-violet (UV) light. The detection of the (UV) irradiation exploits the thermoluminescence (TL) emission of some crystals (phosphors) after being exposed to W irradiation with wavelength in the interval of 280nm – 360nm. It turned out that such crystals are easy to create and their TL glow cuvres possess well-shaped peaks with sufficient statistical data. In this article we present the results of our research toward the creation of netu sintered crystals, sensible to the W emission. Analysis of the thermoluminescence properties of Gd,O3, doped with Eu and Li has been conducted. Different quantities of lithium co-dopant have been added as Li2CO3 to a mixture of Gd2O3 with 10 wt% Eu2O3 . Pellets sintered at a temperature of 10000C have been prepared and the kinetic parameters of the phosphors have been studied after irradiation with W light from a XBO lamp. It has been shown that the addition of 16 wt% Li2CO3of to the mixture of Gd2O3 with 10% Eu2O3 yields a maximum intensity of the peaks at 870C and at 1450C. Spectral emission and spectral sensitivity of the phosphors have been studied. The analysis applied to TL glow curves, obtained from the UV irradiated phosphors and kept after the irradiation at different times in a dark storage, revealed that the peaks have and relatively long fading. Analysis of the thermoluminescence properties of the phosphors obtained from Gd2O3 , doped with Eu and Li, shows that the possess a good sensitivity to the UV emission and could be used for quantitative measurements of UV light.
Keywords: Thermoluminescence, UV Irradiation, UV Detector , Fading, Glow curves
Scope of the Article: Mechanical Design