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New materials for glass-ceramic X-ray storage phosphors
A. Edgar,M. Secu,S. Schweizer,J. -M. Spaeth,G. V. M. Williams,J. Hamlin 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
The development of transparent glass ceramics as X-ray storage phosphors and their advantages over their crystalline coun-terparts are briey reviewed. Measurements of conversion eciency, stimulation eciency, storage times, and optical transparencyare reported for the particular case of europium-doped uorobromozirconate glass, in which rubidium and lithium replace the usualsodium component fraction. Annealing at 280.C converts the as-prepared glass into a glassceramic which contains Rb2BaBr4 andRbBa2Br5 nano- and micro-crystallites. Only the RbBa2Br5 structure shows signicant photo-stimulated luminescence after X-irradiation, and the maximum storage phosphor eciency is 8% of that for the standard commercial storage phosphor BaFBr:Eu.