PURPOSE: To obtain a fluorescent substance having excellent accelerated luminous strength and clarity, useful for radiological image conversion panel, etc., comprising a specific composition unit. ;CONSTITUTION: The fluorescent substance of the formula (X is Cl, Br or I; X' is Br or I; X" to X"" are X; (a), (d), (e), (f), (g) and (h) are numerical values satisfying the condition 10-4≤a+d+e+f+g+h≤10-1; (b) is a numerical value ranging in 10-5≤b≤10-2). The fluorescent substance, for example, is obtained by preparing a mixture of a raw material of fluorescent substance comprising a barium halide, calcium halide, strontium halide, cesium halide, calcium halide, strontium halide, calcium oxide and/or strontium halide and burning the mixture in a weakly reductive or neutral atmosphere at 400-1,300°C for 0.5-10 hours.;COPYRIGHT: (C)1993,JPO&Japio
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机译：目的：获得具有优异的加速发光强度和清晰度的荧光物质，其用于放射线图像转换面板等，其包含特定的组成单元。 ;组成：式（X为Cl，Br或I; X'为Br或I; X“至X”“为X;（a），（d），（e），（f）， （g）和（h）是满足条件10 -4 ≤a+ d + e + f + g +h≤10 -1 的数值;（b）是在10 -5 ≤b≤10 -2 范围内的数值）荧光物质，例如，通过制备荧光物质的混合物来获得包含卤化钡，卤化钙，卤化锶，卤化铯，卤化钙，卤化锶，氧化钙和/或卤化锶的物质，并将混合物在弱还原性或中性气氛中于400-1,300°C燃烧0.5-10小时。;版权：（C）1993，JPO＆Japio
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