Fabrication and optical properties of Tb3+-doped NaCaPO4 glass-ceramics and their radiation detection applications |
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| Authors: | Jie Xu Zhaoyang Chen Minqiang Gai Ting Liu Yanwei Fan Chengfa He |
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| Affiliation: | 1. Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry of CAS, Urumqi, China;2. Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry of CAS, Urumqi, China University of Chinese Academy of Sciences, Beijing, China;3. Laboratory of Solid State Radiation Physics, Urumqi, China |
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| Abstract: | Tb3+-doped 25Na2O-23CaO-6P2O5-44B2O3-2ZrO2 glass was fabricated by conventional melt-quenching technique. Glass-ceramics containing NaCaPO4 crystals were then obtained by heating the as-prepared glasses. Their optical and luminescence properties were studied by FT-IR spectroscopy, photoluminescence (PL), absorption spectra, thermoluminescence (TL), and optically stimulated luminescence in continuous wave modality (CW-OSL). The glasses were composed of [PO4], [BO3], and [BO4] basic structural units. The PL excitation and emission spectra exhibited Tb3+-related transitions, as well as the strongest excitation and emission wavelengths at 370 and 454 nm, respectively. We further investigated the CW-OSL properties as a function of dopant concentration and time elapsed after irradiation (signal fading). Results indicated that the CW-OSL intensity reached a maximum when the Tb4O7 concentration was 0.25 mol%. The fading of the OSL signal showed that the OSL signal of Tb3+-doped NaCaPO4 glass-ceramics was approximately 65% in 8 days, after which the intensity remained stable. The TL glow curves had a broad peak feature peaking at 180 ± 5ºC. The samples also exhibited good signal reusability and a broad linear dose-response range (0.03-1000 Gy). The excellent luminescent and dosimetric properties of these Tb3+-doped NaCaPO4 glass-ceramics indicated their potential applications in radiation dosimetry. |
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| Keywords: | glass-ceramics optically stimulated luminescence photoluminescence radiation dosimetry thermoluminescence |
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