Thermoluminescence characterization of Ag‐doped Li2B4O7 single crystal materials |
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| Authors: | D. Kuralı E. Ekdal Karalı A. Kelemen V. Holovey N. Can T. Karalı |
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| Affiliation: | 1. Department of Electrical and Electronics Engineering, Yasar University, Izmir, Turkey;2. Institute of Nuclear Sciences, Ege University, Izmir, Turkey;3. Centre for Energy Research, HAS, Budapest, Hungary;4. Institute of Electron Physics, NASU, Uzhgorod, Ukraine;5. Physics Department, Jazan University, Jazan, Saudi Arabia;6. Department of Physics, Celal Bayar University, Muradiye‐Manisa, Turkey |
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| Abstract: | In this study, the thermoluminescence (TL) characteristics of Ag‐doped and undoped lithium tetraborate (Li2B4O7, LTB) materials, grown using the Czochralski method, were reported. The TL properties of LTB:Ag, such as glow curve structure, dose response, fading and reproducibility, were investigated. The glow curve of the Li2B4O7:Ag single crystal consists of four peaks located at approximately 75, 130, 190 and 275°C; in undoped LTB, the single crystal shows a broad glow curve with peaks at 65, 90, 125, 160 and 190°C using a heating rate of 5°C/s in the 50–350°C temperature region. The high temperature peak of Ag‐doped sample at 275°C has a nonlinear dose response within the range from 33 mGy to 9 Gy. There is a linear response in the range of 33–800 mGy; after which, a sublinear region appears up to 9 Gy for Ag‐doped LTB single crystal. For undoped single crystal, the dose response is supralinear for low doses and linear for the region between 1 and 9 Gy. The thermal fading ratio of the undoped material is almost 60% for the high temperature peak after 7 days. Ag‐doped LTB single crystal exhibits different behaviour over a period of 7 days. |
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| Keywords: | glow curve LTB:Ag single crystal TL dosimeters undoped LTB |
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