Radiographic intensifying screen

Details Radiographic intensifying screen Radiographic intensifying screen

C - Chemistry, Metallurgy

09

K

117/22

C09K 11/77 (2006.01) G21K 4/00 (2006.01)

Patent

CA 1256746

ABSTRACT OF THE DISCLOSURE A radiographic intensifying screen comprising a support and a fluorescent layer formed on the support, characterized in that said fluorescent layer is composed essentially of a rare earth oxysulfide phosphor represented by the formula: (Ln1-x-y-z, Tbx, Ry, Az)2O2S wherein Ln is at least one element selected from the group consisting of La, Gd, Y and Lu, R is Ho or Ho+Nd. A is at least one element selected from the group consisting of Pr, Er and Yb, and x, y and z are numbers within the ranges of 0.001?x?0.02, 0.0001?y?0.01 and 0?z?0.01, respectively, and x?y+z.

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