CdWO₄ | Scintillation Crystal

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CdWO4 | Scintillation Crystal is a scintillator with high density, virtually no afterglow, and relatively high light yield, perfect for detecting gamma rays and high-energy X-rays.

SKU: SCN-CDWO Category:

Description

CdWO4 | Scintillation Crystal is a scintillator with high density, virtually no afterglow, and relatively high light yield, perfect for detecting gamma rays and high-energy X-rays.

Cadmium tungstate (CdWO4) is a scintillation crystal most promising for spectrometry and radiometry of radionuclides under extremely low activities because of its low afterglow and sufficiently high light yield. The crystal is transparent and emits light when hit by gamma and X-rays, making it useful as a detector of ionizing radiation. It has relatively high light yield; its light ouput is about 40% of NaI(Tl), but the time of scintillation is quite long (12–15 µs). CdWO4 is often used in computed tomography (CT).

 

KEY FEATURES

  • High density
  • High light yield
  • Short radiation length
  • Low afterglow

 

MAIN APPLICATIONS

  • Environmental monitoring
  • Computed tomography (CT)
  • Container scanning system
  • Safety inspection

Technical Specifications

Density

7.9 g/cm³

Melting Point

1871 K

Refractive Index

2.2–2.3

Effective Atomic Number

74

Hardness

4–4.5 Mohs

Radiation Length

1.06 cm

Hygroscopicity

No

Wavelength

475 nm

Lower Wavelength Cutoff

330 nm

Decay Time

12,000–15,000 ns

Light Output

15 photons/keV

Photoelectron Yield

~40% ∝ NaI(Tl)

Thermal Expansion Coefficient

10.2 × 10⁻⁶/°C

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