Patent ID: 7183561

Claim:
A radiation image conversion panel comprising a stimulable phosphor layer containing a stimulable phosphor provided on a support, wherein the stimulable phosphor is expressed by following general formula (1), and the stimulable phosphor layer contains NaX″′ of 5–25 PPM where X″′ is at least one halogen atom selected from the group including F, Cl, Br, and I, M 1 X·aM 2 X′·bM 3 X″ 3 :eA General Formula (1); where M 1 is at least one alkaline metal atom selected from the group including Li, Na, K, Rb, and Cs; M 2 is at least one alkaline metal atom selected from the group including Li, Na, K, Rb, and Cs except for M 1 ; M 3 is at least one trivalent metal atom selected from the group including Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; X, X′, and X″ each represents at least one halogen atom selected from the group including F, Cl, Br, and I; A represents at least one metal atom selected from the group including Eu, Tb, In, Ce, Tm, Dy, Pr, Ho, Nd, Yb, Er, Gd, Lu, Sm, and Y; and “a”, “b”, and “e” are numbers satisfying the conditions of 0≦a<0.5, 0≦b<0.5, and 0<e≦0.2, respectively, provided that X is not X″′ when M 1 or M 2 is Na.