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CdWO? Crystal (Cadmium Tungstate) – High-Density Scintillator for CT & Security Screening

Overview Cadmium Tungstate (CdWO?) is a high-performance scintillation crystal valued for its exceptional density, radiation hardness, and low background radiation??making it a critical material in security screening, industrial imaging, and high-energy physics. By efficiently absorbing gamma rays, X-rays, and energetic particles and converting them into measurable blue light (475 nm), CdWO? delivers reliable, high-contrast signals for precise analysis in demanding environments. Our CdWO? crystals are manufactured with strict quality control to ensure uniform light output and structural integrity, making them ideal for applications requiring high stopping power and long-term stability??from medical CT scanners to industrial flaw detection systems.

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Description

Key Advantages
Ultra-High Density (7.90 g/cm3)
One of the densest scintillators available, providing exceptional stopping power for high-energy radiation (X-rays, gamma rays). This enables compact detector designs while ensuring efficient absorption of even the most penetrating radiation.
Superior Radiation Hardness
Withstands intense radiation fields without performance degradation, making it ideal for high-dose applications such as industrial CT (inspecting thick metal components) or high-energy physics experiments (e.g., collider detectors).
No Background Radiation
Free of radioactive impurities, ensuring no spurious signals that could interfere with low-dose measurements. This purity is critical for sensitive applications like environmental radiation monitoring or dark matter research.
Non-Hygroscopic
Completely resistant to moisture absorption, eliminating the need for protective coatings or hermetic sealing. This simplifies device design, reduces maintenance costs, and ensures stability in humid environments (e.g., clinical labs or industrial facilities).
Mechanical Stability
A Mohs hardness of 4?C4.5 ensures resistance to handling damage during detector assembly, while its well-defined cleavage plane ((010)) allows for precise cutting and shaping into custom sizes.
Technical Specifications
Parameter Value Unit
CdWO? (Cadmium Tungstate) has a density of 7.90 g/cm3, an emission wavelength of 475 nm (blue), a light yield of 13,000 photons/MeV, a decay time of 14,000 ns, a hardness of 4?C4.5 Mohs, a refractive index of 2.2?C2.3, a cleavage plane of (010), and a thermal expansion coefficient of 10.2??10?? K?1.

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