CsI(Tl) Scintillation Crystal
ATR Crystal supplies custom CsI(Tl) scintillation crystals (thallium-doped cesium iodide) for X-ray and gamma-ray detection. Standard and low-afterglow grades, custom shapes, scintillation screens and pixelated arrays can be reviewed for your application. For a quotation, send your drawing, dimensions, quantity, surface finish, packaging requirements and photosensor type. State the required material grade and test conditions, including any afterglow acceptance criteria.
Built around your specification
- Listed maximum size
- Phi 120mm x 400mm
- Available items
- monolithic crystal, scintillation screen, linear or 2-D array
- Scintillation decay time (ns)
- 1000
- Emission peak wavelength (nm)
- 550
Final specifications and acceptance criteria are confirmed for the quoted configuration.
Request a quotationOverview
What Is CsI(Tl) Scintillation Crystal?
CsI(Tl) scintillation crystal is thallium-doped cesium iodide used for X-ray and gamma-ray detection. Its green emission is useful for photodiode readout in radiation imaging, security inspection and industrial measurement systems.
ATR Crystal supplies monolithic CsI(Tl) crystals, scintillation screens and CsI(Tl) scintillator arrays. Custom geometry, surface finish, optical interfaces and packaging can be reviewed against your drawing and readout requirements.
Standard and low-afterglow material grades can be reviewed for your application. Grade selection should consider light yield, afterglow measurement conditions and required detector response. For broader material selection, read our scintillation crystal selection guide.
Advantages of CsI(Tl) Scintillation Crystal
- Material grade optionsStandard and low-afterglow types can be reviewed against the detector signal and image-lag requirements.
- Photodiode readoutThe listed emission peak is 550 nm. Confirm sensor response, optical coupling and readout geometry for your detector.
- Custom product formatsMonolithic crystals, screens and linear or 2D arrays can be reviewed from drawings.
- Scintillation light outputCompare material-grade light yield with detector-level results under specified test conditions.
- Machined geometryDimensions, surface finish and optical interfaces can be specified for the detector layout.
- Packaging reviewCsI(Tl) is slightly hygroscopic. Specify humidity exposure, handling and protective packaging for the intended operating environment.
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 scintillation and optical checks can be discussed when the 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.
Specifications
CsI(Tl) Scintillation Crystal Specifications
Listed Formats and Material Properties
| Parameter | Listed value / option |
|---|---|
| Listed maximum size | Phi 120mm x 400mm |
| Available items | monolithic crystal, scintillation screen, linear or 2-D array |
| Scintillation decay time (ns) | 1000 |
| Emission peak wavelength (nm) | 550 |
| Refractive index at emission peak | 1.8 |
| Density (g/cm3) | 4.51 |
| Hygroscopicity | Slight |
| Mohs hardness | 2 |
The listed maximum dimensions are a capability reference. Confirm feasibility for the proposed shape, material grade, processing and quantity during quotation.
Standard and Low-Afterglow CsI(Tl) Grades
| Material grade | Relative light output vs NaI(Tl) | Light yield (photons/keV) | Decay time | Afterglow |
|---|---|---|---|---|
| Low afterglow type | 40% | 48 | 1000 ns | 0.05~0.39%@20ms |
| Standard type | 45% | 54 | 1000 ns | 0.5~5%@6ms |
The afterglow references use different measurement times: 20 ms for the low-afterglow type and 6 ms for the standard type. Request results under the same excitation and measurement conditions for a direct comparison. The listed light yield describes material-grade photon output; detector signal and energy resolution also depend on crystal dimensions, optical coupling and readout. Agree the grade, test conditions and acceptance criteria during quotation.
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 | High density and gamma-ray stopping power | 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 |
Applications
Applications of CsI(Tl) Scintillation Crystal
Security inspection
Industrial level gauge
High energy physics
Nuclear imaging
Ordering
Frequently Asked Questions
What information is needed for a CsI(Tl) Scintillation Crystal quotation?
Can ATR Crystal customize CsI(Tl) Scintillation Crystal?
What applications is CsI(Tl) Scintillation Crystal used for?
Which specifications should be confirmed before ordering?
Can samples and production quantities both be supplied?
How should a low-afterglow CsI(Tl) request be specified?
Identify the intended operating sequence and the time after excitation at which residual output matters. ATR Crystal lists standard and low-afterglow CsI(Tl) options for review. Request the proposed grade and its afterglow test conditions together; a low-afterglow label without a measurement delay, excitation condition or acceptance limit is not a complete specification.
What should a CsI(Tl) enquiry include for photodiode readout?
Include the photodiode model or active-area drawing, crystal geometry, coupling face, packaging constraints and intended application. Specify whether you are requesting a monolithic crystal, a screen or an array. These formats appear separately in ATR Crystal's CsI(Tl) offering and require different mechanical and optical-interface details in a quotation.
Request a quotation
Send your application and specification requirements directly from this page.
Prefer email? Send your drawing or specification sheet to:
sales@atrscintillator.com