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  • CdWO4 Scintillator Crystals
  • CdWO4 Scintillator Crystals

CdWO4 Scintillator Crystals

  • Low afterglow
  • High density and High-Z scintillator
  • Relatively high light yield and High Radiation Hardness
  • Bulk crystal and CdWO4 1-Dimensional/2-Dimensional Arrays offered
  • Main applications: Security inspection, X-ray CT, High energy physics, Nuclear medicine
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Basic Properties:

Melting Point (°C) 1598 Density (g/cm3) 7.9
Hygroscopic None Hardness (ns) 4~4.5
Wavelength of Emission Max. (nm) 475 Refractive Index @ Emission Max 2.2~2.3
Decay Time (ns) 14000 Light Yield (photons/MeV) 12000~15000
Photoelectron Yield (% of NaI(Tl)) (for γ-rays) 30~50 Afterglow(%@3ms) <0.1
Radiation Length(cm) 1.06


Specifications and Abilities:

Growth Method Bridgman Maximum Dimension ∅ 80 mm x 200 mm
Available Items Single crystal and 1D array or 2D array Inhomogeneity between pixels in array <15%

CdWO4-Cadmium tungstate scintillation crystal is characterized by high density, high atomic number and relatively high light yield with extremely low decay time. When subjected to x-ray irradiation, the after-glow of CdWO4 is very slow typically less than 0.1% at 3ms, and CdWO4 scintillators also demonstrate very good resistance to radiation. All of these features are significant and make CdWO4 a primary scintillation crystal for x-ray Computerized Tomography (CT) and  X-ray security scanning inspection.

Hangzhou Shalom EO offers the custom CdWO4 crystals upon customers' requests. Linear one-dimensional and two-dimension CdWO4 Scintillation Arrays are also available. The latter might even be coupled with silicon photodiodes if you require it.


  • Security inspection
  • X-ray CT
  • High energy physics
  • Nuclear medicine

CdWO4 Scintillator Arrays

CdWO4 Scintillator Arrays

  • Low afterglow and High density, High Z scintillator
  • Relatively High light yield and High resistance of energy radiation damage
  • Suitable for low activity counting applications
  • Linear Arrays of 8, 16, 32, 64…elements and 2-Dimensional Arrays of 6×10, 12×18, 24×36…elements availble
  • Minimum pixel or crystal element size : 0.3mm x 0.3mm
  • Application Notes:Security inspection,X-ray CT,High energy physics,Nuclear medicine