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You are here: Home / Scintillator Products / Tl:CsI,Na:CsI,CsI

TI:CsI, Na:CsI,CsI Scintillator Crystals

TI:CsI is one of the brightest scintillators. It has most of its emission in the long wavelength part of the spectrum (>500nm), it is well-suited for photodiode readout. TI:CsI crystal has high light yield, no cleavage surface, low melting point and easy growth. It has good optical properties, mechanical properties, physical and chemical stability and high photoelectric conversion efficiency. It is a scintillator with excellent comprehensive performance. It has been widely used in many fields, such as Security check, Detection of neutrinos, Detection of neutrinos andγ-ray, XCT.

Pure CsI is also known as a scintillator but exhibits rather different properties. It exhibits fast (~10 ns) emission, peaking at 310 nm, but its scintillation yield at room temperature is very low. But its light yield at 77 K reaches an impressive 100,000 ph/MeV, that makes pure CsI a very attractive scintillator for detector applications at low temperatures.

Na-doped cesium iodide (Na:CsI) is an important alkali metal halide inorganic scintillator that is widely used as laser-stimulable transparent film and X-ray detection materials. Na:CsI has peaking emission at 420 nm, and its decay time is about 630 ns.As an inorganic scintillator, Na:CsI has  relatively high luminescence intensity and effective atomic number compared to organic scintillator. Recently, it is found that Na:CsI is a promising suitable detection material for dark matter scientific exploration. 

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Parameter

Material Features
Chemical formulaTI:CsINa:CsICsI
Density (g/cm3)4.514.514.51
Melting point (℃)894621894
Hardness (Mho)222
HygroscopicSlightlyYesSlightly
CleavageNoNoNo
Solubility (g/100gH2O)N/AN/A/
Thermal expansion coeff (C-1)54*10-654*10-654*10-6
Scintillator Properties
Chemical formulaTI:CsINa:CsICsI
Wavelength(Max. emission) (nm)550420315
Wavelength range (nm)320-300-260-
Decay time (ns)90030016
Light yield (photons/keV)54412
Light output relative to Nal(Tl) (%)45855
Refractive index1.8@550nm1.84 (@420nm)1.95
Radiation length (cm)1.861.861.86
Optical transmission (um)TBATBA/
Transmittance (%)TBATBA/
Reflection loss/surface (%)TBATBA/
Neutron Capture Cross-section (barns)1.47TBA/
Afterglow (%)0.5-5.00.5-5.0/
Spertrum
CsI emission spectrumCsI decay time
CsI X-ray radioluminscence spectrumNa-CsI emission spectrum
Na-CsI response waveformNa-CsI transmission spectrum
TI-CsI Emission spectrumTI-CsI Transmission spectrum
Feature
Application
Reference
News
Feature
  • Matched with silicon photodiodes
  • High light yield
  • Low melting point
  • Easy growth
  • Good optical and mechanical properties
  • Good physical and chemical stability
  • High photoelectric conversion efficiency
Application
  • Security check
  • Detection of neutrinos
  • Detection of neutrinos γ-ray
  • XCT
  • PET
  • Position sensitive detector
  • Geological exploration
  • Industrial CT camera
Reference
A discrete scintillation camera module using silicon photodiode readout of CsI(TI) crystals for breast cancer imaging
A new model for the visible emission of the CsI: Tl crystal
A systematic study of the performance of the CsI:Tl single-crystal scintillator under X-ray excitation
Calibration of a CsI(Tl) crystal with nuclear recoils and pulse shape measurements for dark matter detection
Centers of near-IR luminescence in bismuth-doped TlCl and CsI crystals
Channeling in direct dark matter detection III: channeling fraction in CsI crystals
Dependence of scintillation characteristics in the CsI(Tl) crystal on Tl/sup +/ concentrations under electron and alpha particles excitations
Development of Low Background CsI(Tl) Crystals and Search for WIMP
First limit on WIMP cross section with low background CsI(Tℓ) crystal detector
Improvements in photodiode readout for small CsI(Tl) crystals

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