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  • CsI(Tl) Scintillator Arrays
  • CsI(Tl) Scintillator Arrays
  • CsI(Tl) Scintillator Arrays
  • CsI(Tl) Scintillator Arrays

CsI(Tl) Scintillator Arrays

  • High mechanical hardness
  • Peak emission wavelength well matching with Si photodiode readout
  • Linear Arrays of 1x8, 1x16, 1x32, 1x64, 1x128…pixels
  • 2-Dimensional Arrays of 6×10, 12×18, 24×36... pixels
  • Minimum pixel or crystal element size: 0.3mmx0.3mm
  • Custom Afterglow
  • CsI(Tl) Scintillation Crystals also available in Shalom EO
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Specifications and Capablities:

Single Pixel Size: customized

Minimum Pixel Size: 0.3x0.3mm

Linear Arrays:  1x8, 1x16, 1x32, 1x64, 1x128…pixels

2-Dimensional Array:  6×10, 12×18, 24×36..... pixels, etc.

Afterglow:  0.6%(max) after 100ms (Other afterglow available upon request)

Reflector:  TiO2, BaSO4, ESR etc.

Reflector Thickness: Customized

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

Thallium doped cesium iodide (or CsI(Tl)) is one of the brightest scintillators with a fluorescence spectrum up to 550nm, which allows using photodiodes for the detection of the emission. Because a scintillator-photodiode pair can be used, it is possible to reduce to a significant extent the size of the detection system, do it without high-voltage power supplies, and 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 relatively good radiation hardness properties, CsI(Tl) is also well suited for High Energy Physics. It is used in Phoswiches detector (phosphor sandwich) for whole-body counting and X-radiation astronomies as the "guard crystal" with, often 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 applications. 

Hangzhou Shalom EO provides 1-dimensional or 2-dimensional CsI(Tl)  pixellated arrays ideal for the X-radiation scanning systems for medical and security applications. Photodiodes can be also assembled with CsI(Tl) array if it is required.


  1. Medical X-ray Computer Tomographies (CT)
  2. Environmental monitoring:  gamma-radiation monitoring
  3. Security control:  active portal monitors, X-radiation scanning systems, radiation isotope identification devices
  4. Industrial –health physics, neutron activation analysis, non-destructive testing
  5. High Energy Physics (HEP) and Electromagnetic calorimeter of Astrophysics
  6. Position sensitivity detectors


CsI(Tl) Scintillator Crystals

CsI(Tl) Scintillator Crystals


Scintillation Detection Arrays (Coupled with Si PDs)

Scintillation Detection Arrays (Coupled with Si PDs)

  • Linear Scintillation Array + Monocrystalline Si Photodiode Array + Mounting Board
  • Element size width 1.4mm, height 2.5nm, with element pitch of 1.575nm
  • Modules of 16 elements, 64 elements, and 128 elements are available
  • Wide spectral range of 350-1100nm (responsitivity peak at 950nm)
  • A variety of scintillator materials including CsI(Tl), GOS ceramic, CdWO4, or other custom choices
  • Dual energy inspection is enabled when combining a CsI(Tl) detector for high energy and GOS detector for low energy