MANUFACTURING METHOD OF RARE EARTH-ACTIVATED ALKALINE EARTH METAL FLUOROHALIDE PHOTOSTIMULABLE PHOSPHOR, RARE EARTH-ACTIVATED ALKALINE EARTH METAL FLUOROHALIDE PHOTOSTIMULABLE PHOSPHOR PRECURSOR, RARE EARTH-ACTIVATED ALKALINE EARTH METAL FLUOROHALIDE PHOTOSTIMULABLE PHOSPHOR AND RADIATION IMAGE-CONVERTING PANEL

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a rare earth-activated alkaline earth metal fluorohalide photostimulable phosphor (photostimulable phosphor) excellent in brightness, granularity and sharpness stability with the lapse of time, a photostimulable phosphor precursor and a photostimulable phosphor, and a radiation image-converting panel.;SOLUTION: In the manufacturing method of the photostimulable phosphor represented by general formula (1): Ba_1-xM²_xFBr_yI_1-y: aM¹, bLn, cO [wherein M¹ is an alkali metal atom; M² is an alkaline earth metal atom; Ln is a rare earth element such as Ce or Eu; 0x0.3; 0y0.3; 0a0.05; 0b0.2; and 0c0.1], the photostimulable phosphor precursor is obtained by simultaneously carrying out a step for obtaining a precipitate of the photostimulable phosphor precursor crystal by adding an aqueous solution of an inorganic fluoride into the reaction mother liquor obtained by introducing a reducing agent into the reaction mother liquor where a barium halide is dissolved, and a step for removing solvents from the reaction mother liquor.;COPYRIGHT: (C)2005,JPO&NCIPI