title: Thermoluminescence characterization of Ag-doped Li2B4O7single crystal materials.
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.
authors.affiliation: Department of Electrical and Electronics Engineering, Yasar University, Izmir, Turkey.|Institute of Nuclear Sciences, Ege University, Izmir, Turkey.
authors.forename: D
authors.initials: D
authors.lastname: Kuralı
authors.affiliation: Institute of Nuclear Sciences, Ege University, Izmir, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Ekdal Karalı
authors.affiliation: Centre for Energy Research, HAS, Budapest, Hungary.
authors.forename: A
authors.initials: A
authors.lastname: Kelemen
authors.affiliation: Institute of Electron Physics, NASU, Uzhgorod, Ukraine.
authors.forename: V
authors.initials: V
authors.lastname: Holovey
authors.affiliation: Physics Department, Jazan University, Jazan, Saudi Arabia.|Department of Physics, Celal Bayar University, Muradiye-Manisa, Turkey.
authors.forename: N
authors.initials: N
authors.lastname: Can
authors.affiliation: Institute of Nuclear Sciences, Ege University, Izmir, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Karalı
mesh_terms: D001881:Borates / Q000737:chemistry*; D003460:Crystallization; D008163:Luminescent Measurements / Q000379:methods*; D015203:Reproducibility of Results; D012834:Silver / Q000737:chemistry*; D013696:Temperature; D013819:Thermoluminescent Dosimetry / Q000379:methods*
chemical_list: D001881:Borates; D012834:Silver; C021755:tetraborate
keywords: LTB:Ag; TL dosimeters; glow curve; single crystal; undoped LTB