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Scintillating Crystals are used to detect the energy and intensity level
of γ ray. The crystals are used as a key functional material in
modern science and technology. Its application can be found in various
occasions such as airport, railway station, customs, port as well as oil
field and geographic exploration where detection is required. NaI:TI Crystal and NaI Detector
NaI is a kind of scintillation crystal with good properties. It
has a very high luminescence efficiency and is available in single
crystals or polycrystalline forms in a wide variety of sizes and
ge0metries. The material exhibits no significant self absorption of the
scintillation light and has good resolution ability to X-ray and γ-ray.
Of all available scintillators, NaI is the most extensively used material.
It is widely used in nuclear medicine, well logging, environmental
monitoring, high energy physics and in many other applications.
Red Optronics supply both NaI crystals and NaI detectors(150°C and 175°C
).
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Main Properties
CsI(TI)
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| Density |
4.51 g/cm3 |
| Melting Point |
894°C |
| Hardness |
2 Mohs |
| Hydroscopicity |
little |
| Afterglow (after
6ms) |
0.5%-5.0% |
| Decay
constant |
1000 ns |
| Expansion
coefficient |
54×10-6/K |
| Radiation
length |
1.7 cm |
| Emission
wavelength |
540 nm |
| Light
yield |
52 - 56×103
photons/MeV |
Refractive
Index
(Maximum emission wavelength) |
1.79 |
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Main Properties of
NaI(TI)
|
|
| Density |
3.67 g/cm3 |
| Lattice constant
|
6.46 Å |
| Melting Point |
651°C |
| Hardness |
2 Mohs |
| Hydroscopicity |
little |
| Decay
constant |
Fast620 ns Slow250
ns |
| Radiation
length |
2.6 cm |
| Emission
wavelength |
Fast310 nm
Slow410 nm |
| Light
yield |
52 - 56×103
photons/MeV |
Refractive
Index
(Maximum emission wavelength) |
1.85 |
| Linear attenuation
coefficient
|
(for 511 kev γ-rays)
0.34 cm-1 |
| Light yield
|
Fast 6.5×103
Slow4×104 photon/Mev |
| Energy resolution(
for 511)
|
about 8 Kev% |
| Flatness |
λ/4 @
633nm |
| Parallelism |
<10" |
| Perpendicularity |
<10' |
| Time resolution
(for 60Co) |
1000 ps |
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