Lutetium-yttrium oxyorthosilicate

Lutetium-yttrium oxyorthosilicate, also known as LYSO, is an inorganic chemical compound with main use as a scintillator crystal. Its chemical formula is Lu_2(1-x)Y_2xSiO₅. It is commonly used to build electromagnetic calorimeters in particle physics. LYSO crystals have the advantages of high light output and density, quick decay time, excellent energy resolution.

References

http://authors.library.caltech.edu/8520/1/CHEieeetns07b.pdf

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