METHOD FOR CONTROLLING GALLIUM CONTENT IN GADOLINIUM-GALLIUM GARNET SCINTILLATOR

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PROBLEM TO BE SOLVED : To provide a method for controlling gallium content in a garnet scintillator containing gadolinium and gallium. SOLUTION : There is provided a method including manufacturing a powder having a composition of M1aM2bM3cM4dO12 and heating the powder in oxygen-containing atmosphere at 800 to 1, 700°C to manufacture a crystal scintillator. In the formula, O is oxygen, M1, M2, M3 and M4 are each different first to fourth metals, sum of a to d is about 8, a is about 2 to about 3.5, b is 0 to about 5, c is 0 to about 5, d is 0 to about 1 and b and c, b and d or c and d cannot be 0 at same time, M1 is a rare earth element containing gadolinium, yttrium, lutetium, scandium or a combination thereof, M2 is aluminum or boron, M3 is gallium, M4 is co-dopant and contains one of thallium, copper, silver, lead, bismuth, indium, tin, antimony, tantalum, tungsten, strontium, barium, boron, magnesium, calcium, cerium, yttrium, scandium, lanthanum, lutetium, praseodymium, terbium, ytterbium, samarium, europium, holmium, dysprosium, erbium, thulium or neodymium. SELECTED DRAWING : None COPYRIGHT : (C)2017, JPO&INPIT