Through-side Well NaI(Tl) Scintillator
Through-Side Well NaI(Tl) Scintillator for Continuous Sample Monitoring
Through-side Well NaI(Tl) Scintillator is a hermetically sealed sodium iodide scintillator with a through-side hole passing across the crystal geometry. This structure is used when a sample tube, source path, pipe or moving specimen must pass through the detector region for continuous or repeatable measurement.
The through-side design is useful for continuous flow monitoring, pipe monitoring, fuel rod or sample scanning, radioimmunoassay-related geometries and other detector systems where end-well insertion is not suitable. Final efficiency depends on hole diameter, crystal size, source distribution, sample path, shielding and readout design.
ATR Crystal supplies through-side well NaI(Tl) scintillators with aluminum or stainless steel housing options, K9 glass, quartz or sapphire optical windows, custom hole dimensions, flanges and mounting features. Because NaI(Tl) is hygroscopic, reliable hermetic encapsulation is required.
Applications of Through-side Well NaI(Tl)
Continuous flow radiation monitoring
Pipe and tube sample measurement
Fuel rod or passing-source scanning systems
Radioimmunoassay-related detector geometries
Low-level gamma-ray monitoring
Custom PMT-coupled well detector assemblies
Features of Through-side Well NaI(Tl)
- Through-side sample pathA side hole allows tubing, source path or sample holders to pass through the scintillator region.
- High listed efficiencyStandard models list detection efficiency from >=75% to >=80%, depending on size and geometry.
- High light outputNaI(Tl) provides high scintillation light output for PMT-coupled gamma detection.
- Good energy resolutionNaI(Tl) is widely used where gamma-ray counting and moderate spectroscopy performance are required.
- Hermetic encapsulationAluminum or stainless steel housing protects the hygroscopic NaI(Tl) crystal.
- Custom hole and housing optionsHole diameter, path position, flange, window and mounting details can be reviewed by drawing.
Typical Specification
| Model | Crystal D1 | Crystal H | Hole Dia. | Outer D2 | Outer L | Aperture d | Encapsulation | Detection Efficiency |
|---|---|---|---|---|---|---|---|---|
| NaI-D40H40-SH20 | 40 mm | 40 mm | 20 mm | 45 mm | 47 mm | 19 mm | Aluminum housing with K9 glass window | >=80% |
| NaI-D50H50-SH25 | 50 mm | 50 mm | 25 mm | 56 mm | 57 mm | 24 mm | Aluminum housing with K9 glass window | >=75% |
| NaI-D75H75-SH35 | 75 mm | 75 mm | 35 mm | 81 mm | 82 mm | 34 mm | Aluminum housing with K9 glass window | >=75% |
Note: other sizes or specifications can be customized according to your requirements.
Through-side Well vs. Related NaI(Tl) Geometries
| Product | Best Fit | Main Advantage | Design Notes |
|---|---|---|---|
| Through-side Well NaI(Tl) | Continuous flow, pipe or passing-source monitoring | Side through-hole sample path | Hole diameter and path alignment are critical. |
| End Well NaI(Tl) | Small vial or sample counting | End well gives high geometric efficiency for inserted samples | Well depth and sample vial size should be specified. |
| General Encapsulated NaI(Tl) | Standard gamma detection | Cylindrical detector format | No sample-through geometry. |
| Square Type NaI(Tl) | Detector arrays and rectangular layouts | Square/cuboid geometry | Useful when packing geometry matters. |
Through-side Well NaI(Tl) RFQ Checklist
| RFQ Item | Information to Provide |
|---|---|
| Application | Flow monitoring, pipe measurement, passing-source scan, sample counting or custom detector. |
| Sample path | Tube diameter, source path, sample geometry, alignment requirement and expected count rate. |
| Crystal and hole | Crystal diameter/height, hole diameter, aperture, outer dimensions and tolerance. |
| Encapsulation | Housing material, optical window, flange, connector and mounting requirement. |
| Performance target | Detection efficiency, energy resolution, background requirement and test source. |
| Order information | Quantity, drawing, inspection report and delivery schedule. |
