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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
  • Single crystal and CdWO4 1D array or 2D 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 and CdWO4 arrays upon customer's request, the linear or one-dimension (1D) and two-dimension (2D) arrays are available, and the CdWO4 scintillation array integrated with Photodiode (PD) assemblies are also offered. 


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

CdWO4 Arrays

CdWO4 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
  • Single Element at customized sizes available
  • 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

CsI(Tl) Scintillator Crystals

CsI(Tl) Scintillator Crystals

  • Extremely High Light Output
  • Excellent Mechanical Properties
  • CsI(Tl) Crystals and CsI(Tl) Arrays Available
  • Custom Short After-glow available
  • Applications: Nuclear Radiation Detection, Security and Industrial Inspection, Medical CT

GOS (Gd2O2S:Pr) Scintillation Arrays

GOS (Gd2O2S:Pr) Scintillation Arrays

  • Relatively High Light Output and High Density,Good Machinability
  • Low Afterglow less than 0.1% at 3 ms and Excellent Moisture Resistance, goodchemical stability
  • Well matched with the spectral sensitivity of silicon photodiodes (Si PD)
  • Emission peak spectral range at 470 ~ 900 nm
  • Minimum pixel or crystal element size : 0.3mm x 0.3mm
  • Applications:Computerized Tomography (CT) Scanners, security devices and non-destructive testing systems