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• W1968487759 abstract "Abstract The luminescence in SrAl 2 O 4 : Eu 2 + , Dy 3 + under continuous excitation is quite different from the “standard” intra-ion photoluminescence (PL) and gradually grows during hundreds of seconds before reaching the saturation (photo-charging effect). In this work, we report the behavior of photo-charging effect under the blue and UV light irradiation at temperatures between 20 and 370 K, as well as afterglow (AG) and thermoluminescence (TL) observed after the irradiation termination. At 20 K the photo-charging effect is absent. With increasing temperature the photo-charging effect appears as a result of PL decreasing due to competitive trapping process with activation energy of 0.17 eV. The AG decay curves are described well by the Becquerel's law with the exponent close to 1. The AG decay time is about 10–50 s and practically does not depend on temperature. The TL glow curve exhibits at least seven partially overlapped peaks with maxima at 50, 65, 80, 155, 200, 250 and 290 K. The emission spectra of Eu 2 + consist of two bands at 450 and 520 nm. Both the bands are the same for the PL, AG and TL spectra, but their ratio depends on temperature and the luminescence type." @default.
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• W1968487759 date "2007-04-01" @default.
• W1968487759 modified "2023-09-25" @default.
• W1968487759 title "Photoluminescence, afterglow and thermoluminescence in irradiated with blue and UV light" @default.
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• W1968487759 doi "https://doi.org/10.1016/j.radmeas.2007.01.064" @default.
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