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Luminescence properties of Lu 2 O 3 :Eu 3+ and Lu 2 O 3 :Tb 3+ nanocrystalline powders with the particle size varying from 46 to 6nm were studied under excitation by synchrotron radiation in the photon energy range (up to ∼22.5eV) covering the region where the processes of multiplication of electronic excitation occur. It was found that the excitation...
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