CsI(Tl) Array
Thallium-activated Cesium Iodide, CsI(Tl), is among the brightest scintillator materials available. It features high density, exceptional gamma-ray stopping power, excellent energy resolution, and high light output, resulting in superior detection efficiency for both gamma rays and X-rays. With no cleavage planes and excellent processability, CsI(Tl) can be machined into a wide variety of shapes. Furthermore, its long-wavelength emission spectrum (>500nm) makes it highly compatible with photodiode readout systems. CsI(Tl) crystals are frequently manufactured into linear and 2D arrays, which are widely utilized in X-ray security inspection systems, non-destructive testing (NDT), food inspection, and other applications. At Atr Crystal, we manufacture custom CsI(Tl) linear and 2D arrays tailored to our customers'…
Built around your specification
- Chemical formula
- CsI:Tl
- Density
- Approx. 4.51 g/cm3
- Emission peak wavelength
- Approx. 550 nm
- Decay time
- Approx. 1000 ns, with application-dependent afterglow
Final specifications and acceptance criteria are confirmed for the quoted configuration.
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What Is CsI(Tl) Scintillator Array?
CsI(Tl) Scintillator Array CsI(Tl) scintillator arrays are pixelated cesium iodide thallium detector components for X-ray imaging, gamma detection, security inspection, and medical or industrial detector modules.
ATR Crystal supplies CsI(Tl) Scintillator Array 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.
For material-level specifications, see our CsI(Tl) scintillation crystal product page.
Advantages of CsI(Tl) Scintillator Array
- High light outputCsI(Tl) provides high scintillation light output for practical X-ray and gamma-ray detector designs.
- Emission suited to photodiodesIts green emission is useful for silicon photodiode readout in many imaging systems.
- Custom pixelated geometryLinear and 2D arrays can be manufactured according to detector pitch and readout format.
- Good stopping efficiencyThe material provides useful stopping power for X-ray and gamma-ray detection.
- Reflector customizationReflector material and pixel isolation can be selected for light collection and crosstalk control.
- Application flexibilityCsI(Tl) can support compact imaging modules, arrays, and detector assemblies.
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.
Related selection guide
Specifications
CsI(Tl) Scintillator Array Specifications
Key Specifications and Options
| Parameter | Typical Value / Option |
|---|---|
| Chemical formula | CsI:Tl |
| Density | Approx. 4.51 g/cm3 |
| Emission peak wavelength | Approx. 550 nm |
| Decay time | Approx. 1000 ns, with application-dependent afterglow |
| Hygroscopicity | Slightly hygroscopic; packaging requirements depend on environment |
| Typical use | X-ray imaging and gamma detection arrays |
| Refractive Index (peak wavelength) | 1.8 |
| Mohs hardness | 2 |
Reflector Options
| Material | Thickness of reflector material + adhesive |
|---|---|
| TiO2 | ≥0.1 mm |
| Teflon | 0.15 – 0.5 mm |
Standard and Low-Afterglow Material Grades
| Material type | Relative light output vs NaI(Tl) | Light yield (photons/keV) | Decay time | Afterglow |
|---|---|---|---|---|
| Standard type | 45% | 54 | 1000 ns | 0.5~5%@6ms |
| Low afterglow type | 40% | 48 | 1000 ns | 0.05~0.39%@20ms |
The listed afterglow values use different measurement times: 6 ms for the standard type and 20 ms for the low-afterglow type. For a direct comparison, request results under the same excitation and measurement conditions. Confirm the material grade, test conditions and acceptance criteria during quotation.
Comparison with Related Scintillator Arrays
Use this table to compare common pixelated scintillator array choices at the design-selection stage. Final selection should still be confirmed against pixel size, reflector, readout, and test conditions. Review our scintillator array range for other materials and readout layouts.
| Design Point | LYSO(Ce) Array | GAGG(Ce) Array | BGO Array | CdWO4 Array | CsI(Tl) Array |
|---|---|---|---|---|---|
| Density / stopping power | High, about 7.1-7.4 g/cm3 | High, about 6.6 g/cm3 | High, about 7.13 g/cm3 | Very high, about 7.9 g/cm3 | Moderate, about 4.51 g/cm3 |
| Timing / decay behavior | Fast, about 32-44 ns depending on type | Fast to balanced, type dependent | Slower, about 300 ns | Very slow, about 14000 ns | Slower, about 1000 ns |
| Typical strength | PET, TOF-PET, compact gamma imaging | High light output, no Lu-176 background | Compact stopping power, no intrinsic background | Low afterglow CT and scanning systems | High light output and photodiode matching |
| Handling | Non-hygroscopic | Non-hygroscopic | Non-hygroscopic | Non-hygroscopic | Slightly hygroscopic |
Applications
Applications of CsI(Tl) Scintillator Array
X-ray imaging detector arrays
Security inspection systems
Medical and industrial CT detector research
Gamma camera and radiation imaging modules
High-energy physics detector development
Custom photodiode or SiPM-coupled detector blocks
Ordering
Frequently Asked Questions
What information is needed for a CsI(Tl) Scintillator Array quotation?
Can ATR Crystal customize CsI(Tl) Scintillator Array?
What applications is CsI(Tl) Scintillator Array used for?
Which specifications should be confirmed before ordering?
Can samples and production quantities both be supplied?
How should a CsI(Tl) array drawing distinguish active area from outer dimensions?
Give the crystal pixel dimensions, pixel count and pitch, then dimension the finished array envelope separately. Mark any outer reflector, bonding margin or housing included in that envelope. The sensor alignment should be checked against the active pixel layout, while mechanical fit should be checked against the finished external dimensions.
What should be specified for a low-afterglow CsI(Tl) array?
Identify the requested material grade together with the exposure sequence, delay after excitation and residual-output limit. State whether the requirement is for a material sample or the finished array in a defined readout arrangement. Confirm the measurement basis in the quotation rather than assuming that every array made from a named grade has the same measured residual signal.
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