Thallium-doped cesium iodide (Tl:CsI) is a valuable scintillation crystal used in various radiation detection applications. Like other doped scintillators, Tl:CsI combines the properties of its base material, cesium iodide, with the luminescent characteristics imparted by thallium doping, enhancing its performance in detecting ionizing radiation.
Properties of Thallium-doped Cesium Iodide (Tl:CsI):
- High Light Yield: Tl:CsI is known for its high light yield, which is beneficial for producing strong and clear signals from radiation events.
- Moderate Decay Time: It features a moderate decay time, typically around 1 microsecond, which is suitable for many applications that do not require extremely fast response times.
- Excellent Energy Resolution: The crystal provides excellent energy resolution, aiding in the precise measurement of radiation energy levels.
- Less Hygroscopic: Unlike NaI:Tl, CsI:Tl is less hygroscopic, which means it does not absorb moisture as readily. This makes it easier to handle and maintain, as it does not require as stringent environmental protection.
Applications:
- Medical Imaging: Tl:CsI is used in various imaging systems, including certain types of computed tomography (CT) scanners and other nuclear medicine applications where its ability to clearly resolve energy levels is crucial.
- Industrial Non-Destructive Testing: In industrial settings, Tl:CsI crystals are used in non-destructive testing equipment to inspect materials and components by detecting gamma rays emitted from radioactive sources.
- Security Screening: This crystal is utilized in security screening devices, such as those found in airports and cargo inspection facilities, where its radiation detection capabilities help in identifying illicit materials.
- High-Energy Physics Research: Tl:CsI is employed in particle physics experiments to detect and measure the energy of particles produced in high-energy collisions.
The manufacture of Tl:CsI crystals involves a controlled doping process, where cesium iodide is infused with thallium to optimize its scintillation properties. The balance of high light yield, relatively slow decay time, and robust handling characteristics makes Tl:CsI a preferred choice in many sectors requiring reliable and effective radiation detection.
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Shapeoptics is Able to Offer
- Good quality Tl:CsI scintillation crystal
- Good quality Tl:CsI crystal blank materials
- OEM service for good quality Tl:CsI crystals
Crystal Properties
| Density / g.cm-3 | 4.53 |
| Melting Point / ℃ | 621 |
| Emission Peak / nm | 550 |
| Decay Constant / ns | 1000 |
| Light Output | 47% |
Thallium doped Cesium Iodid Tl:CsI as a good performance scintil- lation crystal, has a broad emission spectrum from 350nm to 700nm which can match well with SPD. It is suitable for detecting heavy charged particles under strong -rays background.
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