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 Lu2Y2xSiO5. It is commonly used to build screens and electromagnetic calorimeters in particle physics. LYSO crystals have the advantages of high light output and density, quick decay time, excellent energy resolution.
Density 7.4
Effective Atomic Number66
Radiation length 1.10
Decay Constant 40-44
Peak Emission 428
Light Yield 190
Index of Refraction1.82
Peak excitation 375
Radiation Hardness >106
Melting Point 2050
Hardness 5.8