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Description
Inorganic scintillators are usually crystals grown in high-temperature furnaces. They include:
- lithium iodide (LiI)
- sodium iodide (NaI)
- cesium iodide (CsI)
- zinc sulfide (ZnS)
NaI(Tl) (thallium-doped sodium iodide) is the most widely used scintillation material.
The iodine provides most of the stopping power in sodium iodide (since it has a high Z = 53).
Equipment
These crystalline scintillators are characterized by high density, high atomic number, and pulse decay times of approximately 1 microsecond (~ 10-6 sec).
Scintillation in inorganic crystals is typically slower than in organic ones. They exhibit high efficiency for the detection of gamma rays and are capable of handling high count rates. Inorganic crystals can be cut to small sizes and arranged in an array configuration to provide position sensitivity.
This feature is widely used in medical imaging to detect X-rays or gamma rays.
Inorganic scintillators are better at detecting gamma rays and X-rays than organic scintillators. This is due to their high density and atomic number, which gives a high electron density. A disadvantage of some inorganic crystals, e.g., NaI, is their hygroscopicity, a property that requires them to be housed in an airtight container to protect them from moisture.
You can now order inorganic scintillator detectors already assembled with a PMT and voltage divider in different dimensions and for a wide range of applications.
