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  • CsI(Tl) Scintillators
  • CsI(Tl) Scintillators

CsI(Tl) Scintillators


  • High light output
  • Emission wavelength at 550nm
  • Compatible with photodiode readout

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Growth Method Bridgman Maximum Dimension Ø110 mm x 300 mm length
Available Items Single crystal and 1D array or 2D array


Basic Properties:

Density(g/cm3) 4.51 Melting Point (K) 894
Cleavage Plane None Hardness(Mohs) 2
Hygroscopic Slightly Refractive Index at Emission Peak 1.79
Emission Peak Wavelength (nm) 550 Lower Wavelength Cutoff (nm) 320
Decay Time (ns) 1000 Light Yield (% of NaI(Tl) ) 45


Thallium activated Cesium Iodide or CsI(Tl) crystals is one of the brightest scintillator.  The maximum of the broad emission situated at 550nm is is well suited for photodiode readout. It has excellent mechanical properties, with a light yield four-times higher than that of BGO and a radiation length shorter than that of NaI(Tl). CsI(Tl) is slightly hygroscopic with plastic mechanical properties. Combined with the relatively good radiation hardness properties, CsI(Tl) is well suited for High Energy Physics. CsI(Tl) arrays are widely used in the medical and security X-Ray CT. 

Hangzhou Shalom EO supplies the CsI(Tl) blanks, polished crystals, encapsulated scintillators and CsI(Tl) arrays, CsI(Tl) array +PD assemblies, 2-dimension arrays upon customer's request.

Application Notes:

  • Nuclear radiation detection
  • High energy physics
  • Security inspection