CSI Scintillation Crystal Cesium Iodide

Product Description

Cesium iodide CsITl, activated by thallium, is one of the most efficient scintillators discovered so far. CSI Crystal exhibits thallium-activated luminescence with an emission peak at 550 nm and a light output of 45% relative to NaITl. In contrast, cesium iodide activated by sodium CsINa features a sodium-activated emission peak at 420 nm and a higher light output 85% of NaITl. Both materials share properties such as deliquescence, soft and plastic mechanical behavior, radiation resistance, high-temperature tolerance, and fast timing characteristics for pure CsI. They are widely used in particle detection for high-energy physics experiments, medical SPECT imaging, baggage/container security inspection, industrial level sensing and non-destructive testing, and cosmic ray research in space physics.

Specification Parameter

Properties Value Unit
Density 4.51 g/cm³
Melting point 894 K
Hardness 2 Mohs
Refractive index 1.79
Light yield 56000 Photon/Mev
Decay Constant 1020 ns
Wavelength of emission max. 550 nm
Afterglow after 30ms 0.5-0.8 %
Hygroscopic slight


CsITl scintillator Cesium Iodide delivers high light output, excellent detection sensitivity, and good energy resolution, making it a preferred choice for radiation detection and medical imaging applications, including CT scans, SPECT imaging, and other diagnostic modalities. Its strong gamma-ray stopping power also makes it ideal for security screening in airports, customs, and critical infrastructure facilities.
 
With an emission peak around 550 nm, CsITl is well matched to photodiode readout systems, ensuring efficient light collection and optimal system performance.

CSI Crystal offers good mechanical strength and excellent machinability, allowing it to be fabricated into a wide range of shapes and sizes. EBO provides customized solutions, including linear and two-dimensional scintillator arrays, tailored to specific detector configurations.
It should be noted that CsITl is slightly hygroscopic, therefore, proper encapsulation is essential to minimize moisture exposure and maintain long-term stability and performance
 
Advantage of CSI Crystal:

High density

Compatible with photodiode readout

Have a light emission at 550 nm

Relatively bright - emits 54,000 photons/MeV 45% of NaITl

Absorber with good stopping power - density 4.51 g/cm³, effective Z of 54

Broad emission, peak at 550nm, ideal for use with photodiodes

Rugged, with good mechanical properties

Application of CSI Crystal?

Radiation detection

Security and Industrial Inspection

Medical CT

Basic Information

About Us

Ningbo EBO Optoelectronics Ltd. is an expert crystal manufacturer providing high quality crystal products globally and scintillation crystal solution. With the goal of exceeding customers’ expectation, EBO thrives on continuous research and development to manufacture more diverse and high-quality products. Our main crystal products include: scintillation crystals such as LYSO CE, YSOCe, BGO, CZT, GAGGCe, CsITl, and NaITl for nuclear medicine and radiography , piezoelectric crystals such as PMN-PT and TeO2 for medical ultrasound, etc.

With more than 20 years’ experience in the field, EBO builds a strong research and design background to provide customers with comprehensive technical support. So far, EBO has more than 200 satisfied customers worldwide. Besides building mass production lines for companies ranging from startups to fortune 500, EBO also supports the development of research prototype for laboratories in universities and national research center around the world. More than 200 highly professional and trained employees work together to ensure customers receiving outstanding services and products.

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