نتایج جستجو برای: ce3 doped
تعداد نتایج: 48705 فیلتر نتایج به سال:
YF3:Ce3+, YF3:Tb3+, and YF3:Ce3+/Tb3+ nanocrystals were synthesized by an ethylenediaminetetraacetic acid (EDTA)-assisted hydrothermal method and characterized by X-ray diffraction and scanning electron microscope. In the excitation spectra, there is one broad excitation band at 285 nm for YF3:Ce3+ and 255 nm for YF3:Tb3+, which are related to the f-d excitations of the Ce3+ and Tb3+ in the hos...
Luminescence-tunable multicolored LaF3:xCe3+,xGd3+,yEu3+ (x = 5; y = 1, 5, 10, and 15 mol%) nanoparticles have been synthesized via a low cost polyol method. Powder X-ray diffraction and high-resolution transmission electron microscopy studies confirm the hexagonal phase of the LaF3:xCe3+,xGd3+,yEu3+ nanophosphors with average sizes (oval shape) ranging from 5 to 7 nm. Energy-dispersive X-ray s...
Several Ce3+/Tm3+-co-doped alumino-silicate glasses with various Ce3+/Tm3+ ratios were prepared by a sol-gel method combined vacuum sintering. To determine their radiation resistance, the exposed to 1 and 100 kGy γ-ray. The effect of ratio on absorption, emission fluorescence lifetime under investigation, was examined before after irradiation. Ce4+ Ce3+ cations detected nature Si-E′ AlOHC color...
‘Tracers’ are bullets that emit light at the backside so shooter can see trajectory of their flight. These light-emitting allow snipers to hit targets faster and more accurately. Conventional tracers all combustion type which use heat generated upon ignition. However, conventional tracer has a fire risk impact site due residual flame by-product contaminate inside gun lead firearm failure. To re...
We study the luminescence decay times of Ce3+: Lu2SiO5 scintillator, co-doped with Sc3+ and Li+ ions, under direct photoexcitation Ce3+ ions at 337 nm excitation by a pulsed electron beam energies 100 – 300 keV. The cathodoluminescence (CL) photoluminescence (PL) studied sample are equal within experimental error. Two emission bands found: in range 370 480 (“high-energy band”) 500 570 (“low-ene...
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