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 CsI(Tl)- Cesium Iodide (Thallium)


Cesium Iodide, activated with Thallium - CsI(Tl) - is one of the brightest available scintillators, with a  

broad emission peaking at 550nm. CsI(Tl) has good stopping power, physically rugged and and well

suited to a broad range of applications.


 Cesium Iodide - CsI(Tl) - scintillator crystals are:



Cesium Iodide - CsI(Tl) - scintillator crystals have the following issues which should be noted. They:



Cesium Iodide - CsI(Tl) - scintillator crystals are useful in diverse applications such as:







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Properties

Optical/Scintillation

Units

Value

Wavelength (Max. Emission)

nm

550

Lower Wavelength Cut-off

nm

320

Decay Time

ns

900

Light Yield

photons/keV

54

Photoelectron Yield

% of NaI(Tl)

45

Radiation Length

cm

1.86

Optical Transmission

µm

TBA

Transmittance

%

TBA

Refractive Index


1.80 (@550nm)

Reflection Loss/Surface

%

TBA

Neutron Capture Cross-section

barns

1.47

Properties

Mechanical

Units

Value

Density

g/cm³

4.51

Atomic Number (Effective)


54

Melting Point

ºK

621

Thermal Expansion Coeff.

C⁻¹

54.0 x 10‾⁶

Cleavage Plane


None

Hardness

Mho

2

Hygroscopic


Slightly

Solubility

g/100gH0

N/A

CsI(Tl) Scintillation Crystals - Sizes


CSI(Tl) Scintillation Crystal - Properties


Diameters:  Up to 80mm

Lengths:      Up to 400mm






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