Phosphor and image storage panel

A divalent europium activated alkaline earth metal halide phosphor having the formula:

• M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSnX".sub.2 :xEu.sup.2+
• in which M.sup.II is at least one alkaline earth metal selected form the group consisting of Ba, Sr and Ca;
• each of X and X' is at least one halogen selected from group consisting of Cl, Br and I, and X.noteq.X';
• X" is at least one halogen selected from the group consisting of F, Cl, Br and I;
• a and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0 and 0<x.ltoreq.0.2, respectively;
• and b is a number satisfying the condition 0<b.ltoreq.10.sup.-3.

A radiation image storage panel comprising a support and a phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which said phosphor layer contains a divalent europium activated alkaline earth metal halide phosphor having the formula:

• M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSiO:xEu.sup.2+
• in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca;
• each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X';
• a and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0 and 0<x.ltoreq.0.2, respectively;
• and b is a number satisfying the conditions of 0<b.ltoreq.3.times.10.sup.-2.

A radiation image storage panel comprising a support and a phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which said phosphor layer contains a divalent europium activated alkaline earth metal halide phosphor having the formula:

• M.sup.II X.sub.2.aM.sup.II X'.sub.2.bSnX".sub.2 :xEu.sup.2+
• in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca;
• each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X', wherein X" is at least one halogen selected from the group consisting of F, Cl, Br and I;
• a and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0 and 0<x.ltoreq.0.2, respectively;
• and b is a number satisfying the conditions of 0<b.ltoreq.10.sup.-3.