Engineering Overview

Square Type NaI(Tl) Scintillator

Square Type NaI(Tl) Scintillator is a hermetically encapsulated square or rectangular sodium iodide scintillator designed for detector arrays, side-entry gamma detection and custom industrial radiation instruments. ATR Crystal supplies aluminum or stainless steel housings with K9 glass, quartz or sapphire windows and custom sizes up to 100 x 100 x 400 mm.

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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.

Frequently Asked Questions

Why use square NaI(Tl) instead of cylindrical NaI(Tl)?

Square or rectangular NaI(Tl) can fit close-packed detector arrays and flat mechanical layouts better than a cylindrical crystal.

Does square NaI(Tl) need hermetic encapsulation?

Yes. NaI(Tl) is hygroscopic, so square and rectangular crystals must be sealed in suitable housings with optical windows.

What is the largest listed square NaI(Tl) size?

The original product page lists a maximum crystal size of 100 mm x 100 mm x 400 mm, about 4 in x 4 in x 16 in.

What information is needed for a square NaI(Tl) quote?

Please provide crystal dimensions, active face, window position, housing material, energy-resolution target, readout method, quantity and drawing if available.