![]() However, optical-quality CsI crystals are very soft and hard to cleave or polish. It has a wider transmission range than the more common potassium bromide beamsplitters, working range into the far infrared. The drawbacks of CsI are a high temperature gradient and a slight hygroscopicity.Ĭaesium iodide is used as a beamsplitter in Fourier transform infrared (FTIR) spectrometers. It shows two main emission components: one in the near ultraviolet region at the wavelength of 310 nm and one at 460 nm. Pure CsI is a fast and dense scintillating material with relatively low light yield that increases significantly with cooling. Properties Solubility of Csl in water Т (☌)Īn important application of caesium iodide crystals, which are scintillators, is electromagnetic calorimetry in experimental particle physics. As a result, Cs atoms are attracted to the walls and vibrate more strongly than I atoms, which are pushed toward the nanotube axis. This difference was explained by the charge difference between Cs atoms (positive), inner nanotube walls (negative) and I atoms (negative). In such chains I atoms appear brighter than Cs atoms in electron micrographs despite having a smaller mass. Ĭaesium iodide atomic chains can be grown inside double-wall carbon nanotubes. īulk caesium iodide crystals have the cubic CsCl crystal structure, but the structure type of nanometer-thin CsI films depends on the substrate material – it is CsCl for mica and NaCl for LiF, NaBr and NaCl substrates. Synthesis and structure Monatomic caesium halide wires grown inside double-wall carbon nanotubes. Caesium iodide photocathodes are highly efficient at extreme ultraviolet wavelengths. ![]() ![]() It is often used as the input phosphor of an X-ray image intensifier tube found in fluoroscopy equipment. Caesium iodide or cesium iodide ( chemical formula CsI) is the ionic compound of caesium and iodine. ![]()
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