CsI(Tl) Scintillation Crystal
What Is CsI(Tl) Scintillation Crystal?
CsI(Tl) Scintillation Crystal Thallium-doped Cesium Iodide (CsI:Tl) delivers an exceptional combination of high Gamma-ray stopping power, superior energy resolution, and robust light output. Uniquely characterized by its lack of a cleavage plane, this highly processable material can be precision-machined into complex custom geometries, standalone crystals, and advanced CsI(Tl) scintillation screens.To meet the rigorous demands of fast-scanning radiation imaging, ATR Crystal engineers specialized low-afterglow CsI(Tl) crystals. Achieving a remarkable afterglow of just 0.05~0.39% @ 20ms, this breakthrough significantly eliminates image trailing and enhances overall resolution without sacrificing total light output.Emitting seamlessly in the long-wavelength spectrum (>500nm) for optimal photodiode (PD) readout, our custom linear and 2-D CsI(Tl) arrays are the industry standard for high-speed luggage and container security inspection, industrial level gauges, and high-energy physics.
ATR Crystal supplies CsI(Tl) Scintillation Crystal for research, industrial, medical, security, and OEM projects. Dimensions, surface finish, packaging, readout matching, and inspection requirements can be reviewed according to your drawing or application.
Applications of CsI(Tl) Scintillation Crystal
Security inspection
Industrial level gauge
High energy physics
Nuclear imaging
Advantages of CsI(Tl) Scintillation Crystal
- High densityHigh density supports compact detector geometry and efficient radiation absorption.
- High Gamma-ray stopping powerProduct geometry can be selected according to application requirements.
- Good energy resolutionProduct geometry can be selected according to application requirements.
- High light outputUseful light output supports detector signal strength and practical readout design.
- Emission wavelength at 550 nmProduct geometry can be selected according to application requirements.
- Compatible with photodiode readoutProduct geometry can be selected according to application requirements.
CsI(Tl) Scintillation Crystal Specifications
Key Specifications and Options
| Parameter | Typical Value / Option |
|---|---|
| Maximum Size | Phi 120mm x 400mm |
| Available items | monolithic crystal, scintillation screen, linear or 2-D array |
| Specification | Type Relative Light Output of NaI(Tl) Decay time Afterglow |
| Low afterglow type | 40% 1000 ns 0.05~0.39%@20ms |
| Standard type | 45% 1000 ns 0.5~5%@6ms |
| Relative Light Output of NaI(Tl) (%) | 40 low afterglow; 45 standard |
| Scintillation Decay Time (ns) | 1000 |
| Emission Peak Wavelength (nm) | 550 |
| Refractive Index (peak wavelength) | 1.8 |
| Density(g/cm3) | 4.51 |
| Specification | Hygroscopic Slight |
| Mohs hardness | 2 |
| Afterglow | 0.05~0.39%@20ms low afterglow; 0.5~5%@6ms standard |
| Light yield (photons/keV) | 48 low afterglow; 54 standard |
Comparison with Related Scintillation Crystal Materials
This comparison helps position the material against common scintillator choices. Exact performance depends on crystal quality, size, wrapping, photosensor, and test conditions.
| Material | Density / Stopping | Timing / Decay | Main Advantage | Handling |
|---|---|---|---|---|
| LYSO(Ce) | High, about 7.1 g/cm3 | Fast, about 36 ns | PET, TOF-PET, compact gamma detection | Non-hygroscopic; contains Lu-176 intrinsic background |
| BGO | High, about 7.13 g/cm3 | Slower, about 300 ns | Strong stopping power and no intrinsic background | Non-hygroscopic |
| NaI(Tl) | Moderate, about 3.67 g/cm3 | About 250 ns | High light yield and strong spectroscopy value | Highly hygroscopic; needs hermetic sealing |
| CsI(Tl) | Moderate, about 4.51 g/cm3 | About 1000 ns | High light output and photodiode-friendly green emission | Slightly hygroscopic |
| GAGG(Ce) | High, about 6.6 g/cm3 | Type dependent, below about 50-150 ns | High light output, non-hygroscopic, no Lu-176 background | Non-hygroscopic |
| CdWO4 | Very high, about 7.9 g/cm3 | Very slow, about 14000 ns | Low afterglow CT and scanning applications | Non-hygroscopic |
| LaBr3(Ce) | About 5.1 g/cm3 | Fast, about 20 ns | Excellent energy resolution and high light yield | Hygroscopic; encapsulation required |
Original Product Data Tables
The following technical tables are retained from the existing product page for specification review.
| Different Types of CsI(Tl) Scintillators (CsI:Tl Scintillators) | |||
| Type | Relative Light Output of NaI(Tl) | Decay time | Afterglow |
| Low afterglow type | 40% | 1000 ns | 0.05~0.39%@20ms |
| Standard type | 45% | 1000 ns | 0.5~5%@6ms |
| Properties of CsI(Tl) Scintillators (CsI:Tl Scintillators) | |
| Relative Light Output of NaI(Tl) (%) | 40 low afterglow; 45 standard |
| Scintillation Decay Time (ns) | 1000 |
| Emission Peak Wavelength (nm) | 550 |
| Refractive Index (peak wavelength) | 1.8 |
| Density（g/cm3） | 4.51 |
| Hygroscopic | Slight |
| Mohs hardness | 2 |
| Afterglow | 0.05~0.39%@20ms low afterglow; 0.5~5%@6ms standard |
| Light yield (photons/keV) | 48 low afterglow; 54 standard |
Customization and Quality Control
- Drawing reviewDimensions, tolerances, surface finish, and assembly details are reviewed before quotation.
- Material and geometry checkThe selected material and product geometry are checked against the intended application.
- Optical and visual inspectionSurface quality, chips, scratches, coating, and appearance can be inspected according to project requirements.
- Performance-related testingRelevant optical, scintillation, or laser-related checks can be discussed when test conditions are defined.
- Packaging supportProtective packaging, wrapping, housing, or handling requirements can be specified for shipment and integration.
- Prototype to batch supplySmall samples and repeat production can be supported depending on material availability and specification.
