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Custom Scintillators & Detectors

Sodium Iodide Detectors

NaI(Tl) scintillation crystals are used in most standard applications for detection of Gamma radiation because of their unequalled high light output and the excellent match of the emission spectrum to the sensitivity of photomultiplier tubes, resulting in a good energy resolution.

Physical Properties:

Density
-
3.67 g/cm3
Emission Max
-
415 nm
Decay Constant
-
0.23 Ás
Refractive index
-
1.85
Conversion Effency
-
100
Hydroscopic
-
Yes

 


Cesium Iodide Detectors (Tl)(Na)(undoped)

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 Ás
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 Ás
Refractive index
-
1.84
Conversion Effency
-
85
Hydroscopic
-
Slightly
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