Production manner of rare earth activate alkaline earths metal conversion iodide thing type photostimulated luminescence body, radiation image transform panel and radiation image photographing mannered

摘要

PROBLEM TO BE SOLVED: To provide a method of producing phosphorescent substance of rare earth-activated alkaline earth metal fluoride iodide that has high sensitivity, good sharpness and graininess.;SOLUTION: The production process for phosphorescent substance of general formula (1) Ba_1-xM²_xFI:aM¹,bLn,cO (where M²: one or more of Be, Mg, Sr, Ca; M¹: one or more of Li, Na, K, Rb, Cs; Ln: Ce, Pr, Sm, Eu, Gd, Tb, Tm, Yb; 0≤x≤0.5, 0≤a≤0.05, 0b≤0.2, 0≤c≤0.1 comprises the following steps: the step where an aqueous solution of BaI₂ of ≥2.5 mol/L concentration is prepared; the step where an aqueous solution of inorganic fluoride solution of ≥5 mol/L concentration is added to the aqueous solution in 120-600 minutes, the aqueous solution is kept at 90-99°C, then the mixture is aged for 180-600 minutes thereby forming the crystalline precipitation of the fluorescent precursor; the step where the precipitate of the precursor crystals is separated from the aqueous solution; and the step where the separated precipitate of the crystalline precursor is fired.;COPYRIGHT: (C)2002,JPO