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Scintillation Crystals

Scintillation Crystals

Cadmium Tungstate Scintillation Crystal
Cadmium tungstate (CdWO4, CWO) single crystal is an important scintillation materials applied in the radiation detection technology, especially for security checking , industrial CT and medical imaging. Large-size CWO single crystals with high quality were grown successfully by vertical Bridgman process in our company in recent years. CWO single crystal has a density as high as 7.9 g/cm-3 without any deliquescence. Under high-energy rays radiation such as X-rays or γ-rays, the crystal exhibits the luminescence output with a central wavelength of 470 nm. The crystal possesses a series of scintillation properties such as a relative light yield 2~3 times of BGO crystal, a low afterglow only 10-2 grade relative to CsI(Tl) crystal and a γ-ray radiation hardness of 107 rad. Our company provide the mass products of CWO wafers and array elements, which can meet the technical requirements for radiation detection devices.
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CsI
CsI
CsI
Cesium Iodide is a material with high γ-ray stopping power due to its relative high density and atomic number. For scintillation counting, it is used either in its undoped form or doped with sodium or thallium. CsI is resistant to thermal and mechanical shock. Compared to NaI(Tl), it is relatively soft and plastic, and does not cleave. Because it has no cleavage plane, it is quite rugged. So it is well suited for well logging, space research or other applications where severe shock conditions are encountered.
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NaI(Tl)
NaI (TI) is the most extensively used material of all the available scintillators. It is grown by host material sodium iodide doped with appropriate percentage of thallium. The main emission wavelength is 415nm, which well matched with the working wavelength of photomultiplier tubes (PMTs). It has very high luminescence efficiency and exhibits no significant self absorption of the scintillation light and has good resolution ability to X-ray and γ-ray.
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LaCl3(Ce)
Cerium-doped lanthanum chloride LaCl3(Ce) is a newly developed scintillation crystal with hexagonal structure, colorless, transparent. It offers superior energy resolution, fast emission and excellent linearity. It has light output similar to NaI(Tl) but much better energy resolution. LaCl3(Ce) is a promising scintillation crystal used for various applications including Gamma-ray detect, Nuclear-medical imaging (PET,SPECT), High-energy physics, Security, Geological exploration and environmental monitoring fields.
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