CERAMIC SCINTILLATOR ARRAY, METHOD FOR MANUFACTURING SAME, RADIATION DETECTOR AND RADIATION DETECT

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A ceramic scintillator array 1 according to one embodiment of the present invention is provided with : a plurality of scintillator segments 2 which are formed of a sintered body of a rare earth oxysulfide phosphor; and reflective layers 3 which are in - terposed between adjacent scintillator segments. The reflective layers 3 contain a transparent resin and reflective particles dispersed within the transparent resin. The reflective particles contain titanium oxide and at least one inorganic substance selected from the group consisting of alumina, zirconia and silica. The glass transition point of the transparent resin is 50°C or more; and the thermal expansion coefficient of the transparent resin at a temperature higher than the glass transition point is 3.5 × 10-5/°C or less.