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 Lu2(1-x)Y2xSiO5. 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 (g/cm3) 7.4
Effective Atomic Number 66
Radiation length (cm) 1.10
Decay Constant (ns) 40-44
Peak Emission (nm) 428
Light Yield (Relative BGO=100%) 190
Index of Refraction 1.82
Peak excitation (nm) 375
Radiation Hardness (rad) >106
Melting Point (°C) 2050
Hardness (Mohs) 5.8
Lutetium-yttrium oxyorthosilicate
Identifiers
Properties
Lu2(1-x)Y2xSiO5
Density 7.3 g/cm3
Melting point 2,047 °C (3,717 °F; 2,320 K)
1.82
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references


References


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