OXYGEN-INCORPORATED RARE EARTH-ACTIVATED ALKALINE EARTH METAL FLUORINATED HALIDE-BASED PHOSPHORESCENT SUBSTANCE AND METHOD FOR PRODUCING THE SAME AND RADIATION IMAGE TRANSFORMATION PANEL

摘要

PROBLEM TO BE SOLVED: To obtain in high productivity a rare earth-activated alkaline earth metal fluorinated halide-based phosphorescent substance in the form of microparticles with narrow size distribution, and to provide a radiation image transformation panel of high sensitivity and high image quality using the above phosphorescent substance. ;SOLUTION: This method for producing the objective oxygen-incorporated rare earth-activated alkaline earth metal fluorinated halide-based phosphorescent substance of general formula (1): Ba_(1-x)M_2(x)FBr_(y)I_(1-y): aM₁, bLn, cO in a liquid phase is characterized by involiving obtaining a phosphorescent substance precursor by removing the solvent from a reaction mother liquor with a barium concentration of ≥3.3 mol/L.;COPYRIGHT: (C)2003,JPO