The use of divalent fluoride dopants in scintillator materials comprising cerium fluoride is disclosed. The preferred divalent fluoride dopants are calcium fluoride, strontium fluoride, and barium fluoride. The preferred amount of divalent fluoride dopant is less than about 2 % by weight of the total scintillator. Cerium fluoride scintillator crystals grown with the addition of a divalent fluoride have exhibited better transmissions and higher light outputs that crystals grown without the addition of such dopants. These scintillators are useful in radiation detection and monitoring applications and are particularly well suited for high rate applications such as positron emission tomography (PET).
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