METHOD FOR CONTROLLING GALLIUM CONTENT IN GADOLINIUM - GALLIUM GARNET SCINTILLATORS

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Disclosed herein is a method including manufacturing a powder having a composition of formula (1),          M1aM2bM3cM4dO12     (1) where O represents oxygen, M1, M2, M3, and M4 represents a first, second, third, and fourth metal that are different from each other, where the sum of a + b + c+ d is about 8, where "a" has a value of about 2 to about 3.5, "b" has a value of 0 to about 5, "c" has a value of 0 to about 5 "d" has a value of 0 to about 1, where "b" and "c", "b" and "d", or "c" and "d" cannot both be equal to zero simultaneously, where M1 is a rare earth element comprising gadolinium, yttrium, lutetium, scandium, or a combination of thereof, M2 is aluminum or boron, M3 is gallium, and M4 is a codopant; and heating the powder to a temperature of 500 to 1700°C in an oxygen containing atmosphere to manufacture a crystalline scintillator.