Square Type NaI(Tl) Scintillator
Square and Rectangular NaI(Tl) Scintillator for Detector Arrays
Square Type NaI(Tl) Scintillator is a hermetically encapsulated square or cuboid sodium iodide scintillator for gamma-ray detection. It is used when a rectangular active area, close-packed detector layout or side-entry geometry is preferred over a conventional cylindrical NaI(Tl) crystal.
NaI(Tl) is hygroscopic, so the crystal must be sealed in an aluminum or stainless steel housing with an optical window. Square and rectangular forms can support detector arrays, industrial monitoring systems, multi-directional radiation measurement and instruments where the mechanical layout requires a flat or cuboid scintillator.
ATR Crystal supplies square and rectangular NaI(Tl) scintillators with K9 glass, quartz or sapphire windows, custom flanges, mounting features and optional detector integration. The maximum listed crystal size is 100 mm x 100 mm x 400 mm, or about 4 in x 4 in x 16 in.
Applications of Square Type NaI(Tl)
Close-packed gamma detector arrays
Industrial radiation monitoring instruments
Side-entry or multi-directional detection layouts
Portal and area monitoring systems
Custom scintillation detector modules
Research and laboratory counting systems
Design Options and Features
- Square and rectangular geometryCuboid NaI(Tl) crystals support flat active areas and close-packed detector arrangements.
- Hermetic encapsulationAluminum or stainless steel housing protects the hygroscopic NaI(Tl) crystal.
- PMT-compatible emissionNaI(Tl) emission is well matched with many photomultiplier tubes.
- High light outputNaI(Tl) is widely used for gamma-ray detection where high light yield is required.
- Good energy resolutionListed standard square models provide <=8.0% to <=8.5% at Cs-137 662 keV, depending on size.
- Custom windows and fixturesK9 glass, quartz, sapphire, special flanges and mounting fixtures can be reviewed.
Encapsulation Options
| Design Item | Available Option | Notes |
|---|---|---|
| Metal container | Aluminum or stainless steel | Selected according to weight, strength, mounting and operating environment. |
| Optical window | K9 glass, quartz or sapphire | Window material should match readout and mechanical requirement. |
| Geometry | Square, rectangular or cuboid NaI(Tl) | Useful for arrays and flat detector layouts. |
| Custom modifications | Special flanges, mounting fixtures or other mechanical features | Provide drawing for review. |
| Maximum listed size | 100 mm x 100 mm x 400 mm | About 4 in x 4 in x 16 in; subject to feasibility review. |
Typical Specification
| Model | Crystal Size | Encapsulation | Energy Resolution, Cs-137 |
|---|---|---|---|
| NaI-25-25H50 | 25.4 mm x 25.4 mm x 50.8 mm | Aluminum housing with K9 glass window | <=8.0% at 662 keV or better |
| NaI-50-50H50 | 50.8 mm x 50.8 mm x 50.8 mm | Aluminum housing with K9 glass window | <=8.0% at 662 keV or better |
| NaI-50-50H100 | 50.8 mm x 50.8 mm x 100.0 mm | Aluminum housing with K9 glass window | <=8.0% at 662 keV or better |
| NaI-50-100H400 | 50.8 mm x 100.0 mm x 400.0 mm | Aluminum housing with K9 glass window | <=8.5% at 662 keV or better |
| NaI-100-100H400 | 100.0 mm x 100.0 mm x 400.0 mm | Stainless steel housing with K9 glass window | <=8.5% at 662 keV or better |
Note: other sizes or specifications can be customized according to your requirements.
Square NaI(Tl) vs. Related Encapsulated NaI(Tl) Types
| Product | Best Fit | Main Advantage | Design Notes |
|---|---|---|---|
| Square Type NaI(Tl) | Detector arrays and rectangular layouts | Close-packed square/cuboid geometry | Window position and side-entry detection should be specified. |
| General Encapsulated NaI(Tl) | Standard cylindrical gamma detectors | Mature PMT-coupled cylindrical design | Best for common round detector modules. |
| End Well NaI(Tl) | Sample counting | High efficiency around small samples | Well depth and diameter must be defined. |
| Through-Side Well NaI(Tl) | Continuous flow or pipe monitoring | Through-side well geometry | Pipe or sample path must be specified. |
| X-Ray Type NaI(Tl) | Low-energy X-ray detection | Thin crystal and window configuration | Window material and thickness are critical. |
Square NaI(Tl) RFQ Checklist
| RFQ Item | Information to Provide |
|---|---|
| Application | Detector array, side-entry detection, industrial monitoring, portal system or custom module. |
| Crystal geometry | Width, height, length, tolerance, active face and window/readout position. |
| Encapsulation | Aluminum or stainless housing, K9/quartz/sapphire window, flanges and mounting details. |
| Performance target | Energy resolution at Cs-137 662 keV, uniformity and inspection requirement. |
| Readout | PMT, SiPM, photodiode, optical coupling, cable and electronics interface. |
| Order information | Quantity, drawing, packaging and delivery schedule. |
