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- W2492889076 abstract "Abstract In this study, we have synthesized Dy 3+ activated Sr 5 (PO 4 ) 3 F (S-FAP) phosphors by sol-gel synthesis method. The synthesized phosphors were characterized by X-ray diffraction pattern (XRD), scanning electron microscopic (SEM), photoluminescence (PL) and thermoluminescence (TL) for structural, morphological and luminescent properties. Dy 3+ activated Sr 5 (PO 4 ) 3 F phosphor shows its characteristic PL emission at 481 nm and 574 nm due to 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 transitions, respectively. TL characteristics of Dy 3+ doped Sr 5 (PO 4 ) 3 F phosphors were taken after irradiation by 60 Co gamma exposure. Two separate TL peaks at 126 °C and 279 °C were observed in case of Dy 3+ doped phosphor. Sr 5 (PO 4 ) 3 F:Dy 3+ phosphor was irradiated within a wide range of exposure of 50 Gy to 7 kGy doses. Linearity was found up to 2 kGy and thereafter TL response saturates. Fading study was also carried out over the duration of six weeks for Sr 5 (PO 4 ) 3 F phosphor. Trapping parameters were calculated using Chen's peak shape method, initial rise method and various heating rate method. Glow curve is deconvoluted using computerized glow curve deconvolution program. TL sensitivity of Sr 5 (PO 4 ) 3 F:Dy 3+ phosphor is found to be less by a factor of 2.08 than commercially used CaSO 4 :Dy phosphor. In order to identify the defect centers formed upon γ -ray irradiation in Sr 5 (PO 4 ) 3 F:Dy 3+ phosphor, EPR measurements were carried out on un-irradiated and irradiated phosphors." @default.
- W2492889076 created "2016-08-23" @default.
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- W2492889076 date "2016-12-01" @default.
- W2492889076 modified "2023-10-11" @default.
- W2492889076 title "Photoluminescence, thermoluminescence and evaluation of some parameters of Dy3+ activated Sr5(PO4)3F phosphor synthesized by sol-gel method" @default.
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- W2492889076 doi "https://doi.org/10.1016/j.jallcom.2016.07.114" @default.
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