Assessment of Trap Parameters Related with Thermoluminescence Peaks in BGO Single Crystals Doped with Vanadium
N. Uzunov1, H. Hristov2, V. Velev3, N. Arhangelova4, V. Bozadzhiev5, D. Nedeva6, I. Penev7
1N. Uzunov, Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare, Viale dell’ Università 2, 35020 Legnaro (PD), Italy
2Hristo Y. Hristov, Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
3Valentin L. Velev, Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
4Nina Arhangelova, Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
5Ventsislav Bozadzhiev, Faculty of Natural Sciences, Konstantin Preslavsky University, Shumen, Bulgaria.
6D. Nedeva, Technical University of Gabrovo, Gabrovo, Bulgaria.
7I. Penev, Institute for Nuclear Research and Nuclear Energy, Shiptchenski prohod 69, 1574 Sofia, Bulgaria.
Manuscript received on 23 March 2015 | Revised Manuscript received on 30 March 2015 | Manuscript published on 30 March 2015 | PP: 12-15 | Volume-4 Issue-1, March 2015 | Retrieval Number: A1334034115©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: Doped Bi4Ge3O12 (BGO) crystals possessing optical properties such as stimulated luminescence are largely exploited at present for many practical applications. We have conducted detailed studies on the thermally stimulated luminescence of some doped single crystals of BGO. Vanadium-doped (BGO:V) and ruthenium-doped (BGO:Ru) crystals have been grown in the Institute of Solid State Physics at the Bulgarian Academy of Sciences. The crystals have been irradiated with UV light from XBO lamp. Glow curves from BGO:V and BGO: Ru have been acquired using a precise thermoluminescence reader designed in the Laboratory for Nuclear physics and radioecology at the University of Shumen. A computerized glow curve deconvolution method has been exploited to obtain trap parameters of the two crystals. Fading of the peaks for the two types of crystals has been studied for time periods as large as 20 days. No significant time-dependence in peak positions and other trap parameters have been observed so far. Applications of the crystals for beta- and gamma- dosimetric applications have been reviewed.
Keywords: Thermoluminescence, Trap parameters, Glow curve deconvolution, Activation energy, Doped BGO, In-Situ-, In-vivo dose measurements.
Scope of the Article: RF Energy Harvesting