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Tl:Nal Crystal

POC-OC-122502-Tl:Nal Crystal

  • High luminescence efficiency with excellent performance in scintillation applications.
  • High light yield of 38,000 photons per keV for exceptional sensitivity.
  • Emission peak at 415 nm, optimized for detecting radiation efficiently.
  • Decay constant of 250 ns, enabling rapid signal response.
  • Customization options available for specific environmental or industrial applications.

Customizable Components Available for This Material to Meet Your Specific Needs!

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General Description

Thallium-doped Sodium Iodide (Tl:NaI) is a widely used scintillation crystal known for its high luminescence efficiency and exceptional radiation detection capabilities. This crystal is highly effective for converting gamma rays into visible light, making it suitable for environmental monitoring, oil well logging, and high-energy physics experiments. Tl:NaI crystals have a cubic structure and excellent optical properties. Their customizable design makes them versatile for use in various industries, including nuclear medicine and radiological monitoring.

General Applications and Examples

  • Environmental Monitoring: Used in gamma spectrometers for real-time detection of radioactive isotopes in the environment.
  • Oil Well Logging: Deployed in geological surveys for analyzing subsurface formations and detecting natural resources.
  • Medical Imaging: Utilized in gamma cameras for precise radiographic imaging.
  • Radiation Detection in High-Energy Physics: Essential for detecting and measuring radiation in particle accelerators and nuclear reactors.
  • Homeland Security: Tl:Nal Crystal  Suitable for monitoring radioactive materials and ensuring safety in sensitive environments.

Chemical and Structural Properties

Property Value
Density (g/cm³) 3.67
Melting Point (°C) 651
Mohs Hardness 2.1
Thermal Expansion (K⁻¹) 47.4 x 10⁻⁶
Refractive Index 1.85
Emission Peak (nm) 415
Decay Constant (ns) 250
Light Yield (photons/keV) 38,000
Crystal Structure Cubic System
Cleavage Plane (100)
Hygroscopic Yes

Optical Properties

Tl:NaI crystals exhibit high optical efficiency, particularly in gamma-ray scintillation applications. Their luminescence properties enable fast signal responses, with minimal energy loss. The high light yield ensures accurate and reliable radiation detection. Optical transmission characteristics can be customized based on specific application requirements.

Standard Fabrication Specifications

Specification Value
Face Dimension Tolerance ±0.1 mm
Thickness Tolerance ±0.2 mm
Parallelism Error <30 arcsec
Clear Aperture >85%
Protective Chamfers <0.3 mm at 45°
Surface Flatness λ/8 @ 632.8 nm
Wavefront Distortion λ/4 @ 632.8 nm

Spectrum Transmission Curve

The  transmission spectrum is available, showing high absorption and emission peaks at visible wavelengths, particularly in the red, green, and blue regions. This curve confirms the crystal’s efficiency for multicolor laser operations.

Coating Specfication

Coating options are available upon request to enhance performance in specific environments, such as anti-reflective coatings for optimized light transmission or protective coatings for improving moisture resistance.

  • Adhesion Test: Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test: In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test: Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test: Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing: Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test: After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.
Face Dimensions Length (mm) Orientation Price (USD) Customization
20 x 20 mm 10 [100] $490 Available
25 x 25 mm 12 [110] $570 Available
30 x 30 mm 14 [110] $690 Available

POC-OC-122502-Tl Nal Crystal

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