Specifications and Capablities:
Single Pixel Size: customized
Minimum Pixel Size: 0.3x0.3mm
1 Dimensional or Linear Arrays: 1x8, 1x16, 1x32, 1x64, 1x128…pixels
2-Dimensional Arrays: 6×10, 12×18, 24×36..... pixels, etc.
Afterglow: 0.6%(max) after 100ms (Other afterglow available upon request)
Reflector: TiO2, BaSO4, ESR, etc.
Reflector Thickness: Customized
Basic Properties:
| Density(g/cm3) | 4.51 | Melting Point (°C) | 621 |
| Cleavage Plane | None | Hardness(Mohs) | 2 |
| Hygroscopic | Slightly | Refractive Index at Emission Peak | 1.79 |
| Emission Peak Wavelength (nm) | 550 | Lower Wavelength Cutoff (nm) | 320 |
| Decay Time (μs) | 1 | Light Yield (photons/Mev/γ) | 52~56x10^3 |
| Thermal Expansion Coefficient (K^-1) | 54x10^-6 | Photoelectron Yield (% of NaI(Tl) ) (γ-rays) | 45 |
| Afterglow (after 20ms) (%) | <0.5 (for normal CsI(Tl)) |
Thallium-doped cesium iodide, CsI(Tl), is one of the brightest scintillators, with its emission peak located at 550 nm, well within its 350–700 nm emission spectrum. This range aligns great with the spectral sensitivity of photodiodes, making CsI(Tl) ideal for pairing with photodiodes in scintillation detectors. Such a pairing enables the elimination of high-voltage power supplies and reduces the influences of magnetic fields.
In addition to its optical compatibility, CsI(Tl) boasts a large effective atomic number, which enhances its gamma-radiation photoabsorption efficiency due to a larger cross-section. Its exceptional stopping power and robust mechanical properties, combined with good radiation hardness, make it a reliable choice for demanding environments.
Pixellated scintillator arrays, constructed by arranging scintillator crystal pixels in a grid pattern and isolating them with reflectors, further expand its usage. This design enhances spatial resolution and ensures that scintillation light generated by incident radiation is confined to the corresponding pixel, enabling precise localization of the event. These arrays can be formed as 2-dimensional or 1-dimensional (linear) matrices, allowing signals to be captured and integrated into images. With its unique combination of properties, CsI(Tl) scintillation arrays are highly suited for applications in high-energy physics, medical imaging, well-logging, and aviation technologies.
Hangzhou Shalom EO provides 1-dimensional or 2-dimensional CsI(Tl) pixelated arrays ideal for the X-radiation scanning systems for medical imaging and security applications. Photodiodes can be assembled with a CsI(Tl) array if required. Depending on growth conditions, Low-afterglow CsI(Tl) scintillators optimized for tomography applications with typical afterglow values of 0.05~0.39%@20ms can also be obtained, and we can also customize the afterglow values. You might click on the bold text to learn more if you are interested.
Applications:
Drawing:
The figure below illustrates the design of a CsI(Tl) pixellated array, consisting of CsI(Tl) pixels and TiO2 reflectors.
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