METHOD FOR PRODUCING RARE EARTH-ACTIVATED ALKALINE EARTH METAL FLUOROHALIDE-BASED PHOTOSTIMULABLE PHOSPHOR, RARE EARTH-ACTIVATED ALKALINE EARTH METAL FLUOROHALIDE-BASED PHOTOSTIMULABLE PHOSPHOR AND RADIATION IMAGE CONVERSION PANEL

摘要

PROBLEM TO BE SOLVED: To obtain a finely particulate rare earth-activated alkaline earth metal fluorohalide (especially a fluoroiodide)-based photostimulable phosphor having a uniform particle diameter distribution with a good productivity and to provide a high-sensitivity and high-image quality radiation image conversion panel using the photostimulable phosphor.;SOLUTION: This method for producing the rare earth-activated alkaline earth metal fluorohalide-based photostimulable phosphor comprises adding a solution of an inorganic fluoride to a reactional mother liquor containing barium ions and ammonium ions present therein and producing the rare earth-activated alkaline earth metal fluorohalide-based photostimulable phosphor in the method for producing the oxygen- introduced rare earth-activated alkaline earth metal fluorohalide-based photostimulable phosphor represented by the general formula (I): Ba(1-x)M2(x)FBr(y)I(1-y): aM1, bLn, cO (M1 is an alkali metal such as Li, Na, K or Rb; M2 is an alkaline earth metal such as Be, Mg or Sr; Ln is a rare earth element such as Ce, Pr, Sm or Eu; 0≤x≤0.3; 0≤y≤0.3; 0≤a≤0.05; 0b≤0.2; and 0≤c≤0.1).;COPYRIGHT: (C)2002,JPO