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In this paper we report the results on luminescence, excitation spectra and decay times of Cs2NaLaCl6, Cs2NaLaCl6:Ce and Cs2NaCeCl6 crystals, which have been measured in order to elucidate the energy transfer processes and luminescence phenomena in the elpasolite lattice. X-ray pulse (approximately 1 ns) source (30 keV) and synchrotron radiation have been used for the luminescence excitation of the crystals. The Cs2NaCeCl6 crystal displays only Ce3+-ion luminescence bands. Luminescence excitation spectrum of the crystal shows that 5p Cs-core band also takes part in excitation of Ce3+-ions (threshold at 14 eV). The change of Ce concentration in Cs2NaLaCl6 crystals allows us to control a contribution of fast and slow components into total light output of the crystal.
E. N. Mel'chakov,Ian H. Munro,S. V. Petrov,Piotr A. Rodnyi,A. S. Voloshinovsky, andN. G. Zakharov
"Luminescence of Cs2NaLa1-xCexCl6 crystals", Proc. SPIE 2706, Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions, (3 January 1996); https://doi.org/10.1117/12.229143
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E. N. Mel'chakov, Ian H. Munro, S. V. Petrov, Piotr A. Rodnyi, A. S. Voloshinovsky, N. G. Zakharov, "Luminescence of Cs2NaLa1-xCexCl6 crystals," Proc. SPIE 2706, Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions, (3 January 1996); https://doi.org/10.1117/12.229143