Scintillation Crystals and Detectors: CWO

Scintillation Crystals and Detectors: CWO


Scintillation Crystals and Detectors: CWO

CWO stands for Cadmium Tungstate (CdWO4), not CWO. Cadmium tungstate is a crystal material that is commonly used in scintillation detectors due to its high density, high atomic number, and high light output. It is particularly well-suited for detecting gamma rays and high-energy X-rays.

Crystal structure Tetragonal
Lattice constant( Å )
Melting point, °C 1325
Density, g/cm3 7.9
Mohn hardness 4 - 4.5
Thermal expansion, 10-6/K 10.2
Refractive index 2.2 - 2.3
Emission wavelength (nm ) 470/540
Decay constant (ns ) 20 ns @ 470nm
5 ms @ 540 nm
Radiation length (cm ) 0.3
Hygroscopic No
Afterglow % at 6ms 0.1
Effective atomic number
Light yield [photons/MeVy] 1.2 - 1.5 x 104
Background, pulse/sec/kg
Crystal cleavage plane (010)

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