Thallium-doped Caesium Iodide

Thallium-doped Caesium Iodide

CsI(Tl) is a useful scintillator offering high light yield and emits at a wavelength suitable for silicon photomultipliers (SiPMs). Typical applications include arrays of this material used in security imaging systems, such as baggage scanners.

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PropertiesValue
Cleavage PlanesNone
Decay Constant (ns)1000
Density (g.cm-3)4.51
Emission Spectral Range (nm)350-725
Gamma and X-ray absorption coefficients (cm-1)0.48 at 660keV
10.00 at 100KeV
Melting Point (K)894
Peak Scintillation Wavelength (nm)550
Photons/MeV52000
Radiation Length (cm)1.86
Refractive Index at Peak Emission1.78
Solubility (g/100g H2O @ 300K)44.0
StabilitySlightly Hygroscopic
StructureBCC
Thermal Conductivity (W·m-1·K-1) @ 300K1.13
Transmission Range (nm)240-70000
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