CsI(Tl) has the advantage that it is non-hygroscopic, does not cleave and can be read out using silicon photodiodes instead of photomultiplier tubes. These so-called Scintillator Photodiode Detectors are compact, very stable, do not require any high voltage, are rugged, and can be operated in high magnetic fields. These detectors are frequently used in arrays or matrices in particle physics research.

Physical Properties:

Density	-	4.51 g/cm3
Emission Max	-	550 nm
Decay Constant	-	0.6/3.4 µs
Refractive index	-	1.79
Conversion Effency	-	45
Hydroscopic	-	No

 

 

CsI(Na) is a non-hygroscopic, high light output scintillator mainly used for applications where mechanical stability and good energy resolution are required. Below 120 o C it is an alternative to NaI(Tl).

Physical Properties:

Density	-	4.51 g/cm3
Emission Max	-	420 nm
Decay Constant	-	0.63 µs
Refractive index	-	1.84
Conversion Effency	-	85
Hydroscopic	-	Slightly

 

 

CsI(Undoped) Fast, non-hygroscopic, radiation hard, low light output.
Major uses - Physics (calorimetry).

Physical Properties:

Density	-	4.51 g/cm3
Emission Max	-	315 nm
Decay Constant	-	16 ns
Refractive index	-	1.47
Conversion Effency	-	4-6
Hydroscopic	-	No