Browsing by Author "Karali, E. Ekdal"

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    Thermoluminescence characterization of Ag-doped Li2B4O7 single crystal materials
    (John Wiley and Sons Ltd, 2017) D. Kuralı; E. Ekdal Karalı; András Kelemen; Vadym M. Holovey; N. Can; Turgay Karali; Kurali, D.; Karali, E. Ekdal; Ekdal Karalı, E.; Kelemen, A.; Karali, T.; Holovey, V.; Can, N.
    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. © 2023 Elsevier B.V. All rights reserved.