CdWO4 Array
Cadmium Tungstate, CdWO4, is a high-density, high-atomic-number scintillator distinguished by its relatively high light yield. With an emission maximum at 475nm, it delivers a total light output of 12 to 15 photons/keV, achieving a light yield of 30% to 50% relative to NaI(Tl) on a bialkali PMT. Furthermore, CdWO4 offers exceptional radiation resistance and possesses absolutely no intrinsic radioactive background. Consequently, CdWO4 arrays are extensively utilized in rapid inspection applications, including security scanning systems for luggage, shipping containers, and vehicles. Its unique combination of high light output and low afterglow also makes it highly suitable for both medical and industrial Computed Tomography (CT) scanners.At Atr Crystal, we supply custom CdWO4 linear and 2D arrays precisely tailored to our customers' specifications. We typically employ titanium dioxide (TiO2) as a high-performance reflective layer between each individual pixel (element) to ensure optimal imaging resolution and efficiency.
Product Category:
Pixellated Array
Applications of CdWO4 Array
1 ) Industrial computed tomography (CT) scanners
2 ) Medical computed tomography (CT) scanners
3 ) Security inspection
4 ) High energy physics
Advantages of CdWO4 Array
1 ) Low afterglow
2 ) Relatively high light yield
3 ) Strong radiation resistance
4 ) High density
5 ) high atomic number
6 ) No radioactive background
Specifications of CdWO4 Array
1 ) Linear array: 1×8; 1×16; 1×32; 1×64 etc. (customized upon request)
2 ) 2-D array: 6×10; 12×18; 24×36 etc. (customized upon request)
3 ) Minimal pixel size: 0.3 mm x 1 mm
| Reflector Types and Thicknesses of CdWO4 Array | |
| Material | Thickness of reflector material + adhesive |
| TiO2 | ≥0.1 mm |
| BaSO4 | ≥0.1 mm |
| Properties of CdWO4 Cryatal | |
| Relative Light Output of NaI(Tl) | 30%~50% |
| Scintillation Decay Time (ns) | 14000 |
| Emission Peak Wavelength (nm) | 475 |
| Refractive Index (peak wavelength) | 2.3 |
| Density（g/cm3） | 7.9 |
| Hygroscopic | No |
| Mohs hardness | 4.5 |
| Afterglow | ＜0.01%@20ms |
| Cleavage plane | <010> |
| Radiation length (cm) | 1 |
| Light yield (photons/keV) | 12~15 |
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