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  • CsI(Tl) Arrays
  • CsI(Tl) Arrays

CsI(Tl) Arrays

  • Non-hygroscopic
  • High mechanical hardness
  • Long wavelength emission
  • Good matching with Si photodiode readout

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Basic Properties:

Melting Point(K) 894 Density (g/cm3) 4.51
Cleavage Plane None Hardness(Mohs) 2
Hygroscopic Slightly Refractive Index @ Emission Peak 1.79
Emission Peak Wavelength(nm) 550 Lower Wavelength Cutoff(nm) 330
Decay Time(ns) 1000 Light Yield((photons/KeV) 54

Modules or Types:
Single Element Size: customized
Linear Arrays: 8, 16, 32, 64…elements
2-Dimensional Array: 6×10, 12×18, 24×36, ect.
Light Output: 55,000 Photons/Mev
Afterglow: 0.6%(max) after 100ms
Reflector: polymer with TiO2(excellent reflection to ensure minimized cross talk)
Reflector Thickness: Customized


Thallium doped cesium iodide (or CsI(Tl)) is one of the brightest scintillators with the fluorescence spectrum with maximum at 550nm, which allows using photodiodes for detection of the emission. Because a scintillator-photodiode pair can be used, it is possible to reduce significantly the size of the detection system, to do without a high-voltage power supply, and to use the detection system in magnetic fields. CsI(Tl) has a high effective atomic number and consequently larger cross-section of the gamma-radiation photoabsorption. 
CsI(Tl) has very good stopping power, is slightly hygroscopic and with good plastic mechanical properties. Combined with a relatively good radiation hardness properties, CsI(Tl) is also well suited for High Energy Physics. It is used in Phoswiches for whole body counting and X-ray astronomy as the "guard crystal" with typically a thin NaI(Tl) as the primary detector. Depending on growth conditions CsI(Tl) crystals can be obtained with low afterglow for application in tomographic systems. 
Hangzhou Shalom EO provide the one dimension or 2 dimension CsI(Tl) pixellated arrays which are used in the X-Ray scanning systems for medical and security applications. The PD can be also assemblied with CsI(Tl) array if it is required.


Application Notes:

  1. Medical –X-ray computer tomographs
  2. Environmental monitoring –gamma-radiation monitoring
  3. Security control –active potral monitors, X-ray scaning systems, radiation isotope identification devices
  4. Industrial –health physics, neutron activation analysis, non-destructive testing (defectoscopy)
  5. HEP and Astrophysics – electromagnetic calorimeter
  6. Position – sensitivity detectors
LYSO(Ce) Arrays

LYSO(Ce) Arrays

  • Three to four times the light emission of BGO
  • High density
  • Short decay time
  • Fast, single exponential decay time most PMTs


CsI(Tl) Scintillators

CsI(Tl) Scintillators


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