Sodium iodide (thallium-doped) scintillators have high energy conversion efficiency and good energy resolution, making them widely used for the detection of X-rays and gamma rays. They can be manufactured into single crystals or polycrystals of various sizes and shapes. Cesium iodide crystals doped with sodium have a light output close to that of thallium-doped cesium iodide, but with a shorter luminescence decay time. Their emission peak is at 420 nm, which matches well with the spectral sensitivity range of photomultiplier tubes. These crystals also exhibit good temperature stability in their luminescence, making them especially suitable for use in high-temperature environments and space science research.
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Huilei Optical Electric Technology