Gadolinium oxysulfide

Gadolinium oxysulfide

Gadolinium oxysulfide (Gd2O2S), also called gadolinium sulfoxylate or GOS, is an inorganic compound, a mixed oxide-sulfide of gadolinium. Its CAS number is CASREF|CAS=12339-07-0.

Terbium-doped gadolinium oxysulfide is frequently used as a scintillator for x-ray imaging. It emits wavelengths between 382-622 nm, though the primary emission peak is at 545 nm. It is also used as a green phosphor in projection CRTs, though its drawback is marked lowering of efficiency at higher temperatures. [http://www.freepatentsonline.com/5115306.html]

Variants include, for example, using praseodymium instead of terbium (CAS number CASREF|CAS=68609-42-7, EINECS number 271-826-9), or using a mixture of dysprosium and terbium for doping (CAS number CASREF|CAS=68609-40-5, EINECS number 271-824-8).


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