CdWO4 Scintillation Crystal
What Is CdWO4 Scintillation Crystal?
CdWO4 Scintillation Crystal Cadmium Tungstate (CdWO4) is a premium, high-density scintillator distinguished by its high atomic number, exceptional radiation resistance, and strictly zero radioactive background. Delivering a stable light output of 12-15 photons/keV with a peak emission at 475nm, it achieves 30-50% of the light yield of NaI(Tl) while maintaining ultra-reliable, interference-free performance.The critical combination of robust light output and exceptionally low afterglow makes CdWO4 the ultimate material for seamless coupling with silicon photodiodes (PDs). This specific synergy is highly sought after by engineers designing next-generation medical and industrial Computed Tomography (CT) scanners, guaranteeing razor-sharp, high-resolution imaging without trailing artifacts.ATR Crystal precision-manufactures standalone CdWO4 crystals alongside fully customized linear and 2-D CdWO4 arrays. We tailor every configuration to your exact specifications, maximizing detection efficiency for your most rigorous scanning systems.
ATR Crystal supplies CdWO4 Scintillation Crystal for research, industrial, medical, security, and OEM projects. Dimensions, surface finish, packaging, readout matching, and inspection requirements can be reviewed according to your drawing or application.
Applications of CdWO4 Scintillation Crystal
Industrial computed tomography (CT) scanners
Medical computed tomography (CT) scanners
Security inspection
High energy physics
Advantages of CdWO4 Scintillation Crystal
- Low afterglowControlled afterglow helps reduce residual signal in imaging and scanning systems.
- Relatively high light yieldUseful light output supports detector signal strength and practical readout design.
- Strong radiation resistanceProduct geometry can be selected according to application requirements.
- High densityHigh density supports compact detector geometry and efficient radiation absorption.
- high atomic numberProduct geometry can be selected according to application requirements.
- No radioactive backgroundProduct geometry can be selected according to application requirements.
CdWO4 Scintillation Crystal Specifications
Key Specifications and Options
| Parameter | Typical Value / Option |
|---|---|
| Maximum Size | Phi 80mm x 200mm |
| Available items | monolithic crystal, linear or 2-D array |
| 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 |
| Specification | Cleavage plane |
| Radiation length (cm) | 1 |
| Light yield (photons/keV) | 12~15 |
Comparison with Related Scintillation Crystal Materials
This comparison helps position the material against common scintillator choices. Exact performance depends on crystal quality, size, wrapping, photosensor, and test conditions.
| Material | Density / Stopping | Timing / Decay | Main Advantage | Handling |
|---|---|---|---|---|
| LYSO(Ce) | High, about 7.1 g/cm3 | Fast, about 36 ns | PET, TOF-PET, compact gamma detection | Non-hygroscopic; contains Lu-176 intrinsic background |
| BGO | High, about 7.13 g/cm3 | Slower, about 300 ns | Strong stopping power and no intrinsic background | Non-hygroscopic |
| NaI(Tl) | Moderate, about 3.67 g/cm3 | About 250 ns | High light yield and strong spectroscopy value | Highly hygroscopic; needs hermetic sealing |
| CsI(Tl) | Moderate, about 4.51 g/cm3 | About 1000 ns | High light output and photodiode-friendly green emission | Slightly hygroscopic |
| GAGG(Ce) | High, about 6.6 g/cm3 | Type dependent, below about 50-150 ns | High light output, non-hygroscopic, no Lu-176 background | Non-hygroscopic |
| CdWO4 | Very high, about 7.9 g/cm3 | Very slow, about 14000 ns | Low afterglow CT and scanning applications | Non-hygroscopic |
| LaBr3(Ce) | About 5.1 g/cm3 | Fast, about 20 ns | Excellent energy resolution and high light yield | Hygroscopic; encapsulation required |
Original Product Data Tables
The following technical tables are retained from the existing product page for specification review.
| Properties of CdWO4 Scintillators (Cadmium Tungstate Scintillators) | |
| 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 | |
| Radiation length (cm) | 1 |
| Light yield (photons/keV) | 12~15 |
Customization and Quality Control
- Drawing reviewDimensions, tolerances, surface finish, and assembly details are reviewed before quotation.
- Material and geometry checkThe selected material and product geometry are checked against the intended application.
- Optical and visual inspectionSurface quality, chips, scratches, coating, and appearance can be inspected according to project requirements.
- Performance-related testingRelevant optical, scintillation, or laser-related checks can be discussed when test conditions are defined.
- Packaging supportProtective packaging, wrapping, housing, or handling requirements can be specified for shipment and integration.
- Prototype to batch supplySmall samples and repeat production can be supported depending on material availability and specification.
