| 摘要 |
PROBLEM TO BE SOLVED: To obtain a conversion panel that is excellent in luminance and sharpness by allowing a stimulable phosphors expressed in a specific formula on a support to contain BaF2 of a set % or lower, and coating with a protective layer. SOLUTION: The quantity of BaF2 contained in stimulable phosphors expressed in a formula is set at nor more than about 10%, preferably about 1 to 10%, (in the formula, represents one selected from such atoms as iodine, bromine and chlorine). The luminance and sharpness of the stimulable phosphors degrade if the content of BaF2 is 10% or more, and the sharpness of them lowers if it is not more than about 1%. Moreover, X/Ba<=0.975 is established for the stimulable phosphors, and the value of X/Ba is a value measured with an ICP-MS by extracting the stimulable phosphors with nitric acid. In the case of X/Ba>0.975, the stability and resistance to humidity deteriorate. If the crystal structure of the stimulable phosphors is spherical or polyhedral, the filling percentage, sensitivity and resolution are improved. Furthermore, the particle diameters of the stimulable phosphors are set at about 0.1-10μm.
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