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Fabrication and optical properties of Tb 3+ ‐doped NaCaPO 4 glass‐ceramics and their radiation detection applications
Author(s) -
Xu Jie,
Chen Zhaoyang,
Gai Minqiang,
Liu Ting,
Fan Yanwei,
He Chengfa
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16989
Subject(s) - thermoluminescence , materials science , optically stimulated luminescence , photoluminescence , luminescence , analytical chemistry (journal) , doping , dopant , irradiation , ceramic , glass ceramic , spectroscopy , emission spectrum , optics , spectral line , optoelectronics , chemistry , composite material , physics , chromatography , quantum mechanics , astronomy , nuclear physics
Tb 3+ ‐doped 25Na 2 O‐23CaO‐6P 2 O 5 ‐44B 2 O 3 ‐2ZrO 2 glass was fabricated by conventional melt‐quenching technique. Glass‐ceramics containing NaCaPO 4 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 [PO 4 ], [BO 3 ], and [BO 4 ] basic structural units. The PL excitation and emission spectra exhibited Tb 3+ ‐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 Tb 4 O 7 concentration was 0.25 mol%. The fading of the OSL signal showed that the OSL signal of Tb 3+ ‐doped NaCaPO 4 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 Tb 3+ ‐doped NaCaPO 4 glass‐ceramics indicated their potential applications in radiation dosimetry.