NaI(Tl) Crystal, 25x25mm, NaI(Tl) Scintillator, Sodium Iodide doped with Thallium,1"X1"

NaI(Tl) scintillation crystals are manufactured using the Bridgman method at Epic Crystal. Currently, the largest available crystal ingot reaches dimensions of 150 mm in diameter and 400 mm in length. A new milestone is underway with the development of an ultra-large NaI(Tl) crystal measuring 1000 mm × 1000 mm × 250 mm—promising preliminary results have already been achieved.

Our product portfolio includes:

• Bare crystals (without housing)
• Encapsulated crystals in standard and ruggedized configurations
• Complete detector assemblies integrated with photodetectors such as PMTs or SiPMs

Compared to other scintillation materials, NaI(Tl) offers several key advantages: high density, excellent light output, and cost-effectiveness. However, due to its hygroscopic nature, NaI(Tl) is sensitive to moisture, which can degrade optical performance if not properly protected. To ensure long-term stability and reliability, all crystals are hermetically sealed.

Standard encapsulation features an aluminum housing with an optical window. For demanding environments—such as those encountered in measurement-while-drilling (MWD) applications—we offer ruggedized versions with stainless steel or titanium housings and laser-welded seals for superior durability.

In addition to crystal production and encapsulation, we provide full detector integration services. This includes coupling with photomultiplier tubes (PMTs) equipped with standard 14-pin bases. Custom assembly options are also available, incorporating a voltage divider, preamplifier, and 4-pin connector to form a fully functional scintillation detector.

These integrated NaI(Tl) detectors are widely deployed in various industrial and scientific applications, including:

• Nuclear radiation monitoring
• Point and continuous level detection
• Density and concentration measurement
• Geological and mineral exploration

With advanced manufacturing capabilities and comprehensive customization options, Epic Crystal delivers high-performance solutions tailored to diverse detection needs.