Caesium Iodide

Caesium Iodide Scintillator Film

Caesium Iodide (CsI) Scintillation FilmsRMD has developed vapor-grown microcolumnar Caesium Iodide (CsI:Tl) scintillator film, which has become the standard for diagnostic digital radiography. Microcolumnar film scintillator materials channel and conserve scintillation light within densely packaged, highly uniform microcolumns. The microcolumns are parallel, needle-like structures controllable in diameter from 250 nm to 10 μm. They number into the millions per square centimeter yielding very high resolution X-ray imaging performance. Films are typically 10 to 700 μm thick, however structures up to 3 mm in thickness are routinely synthesized. Physical sizes may vary from under 1 cm2 to over 16″ x 16″ (48 x 48 cm2) in area, and may be fabricated to any desired shape.

Total internal reflection of the scintillation light within microcolumns yields high spatial resolution, enhanced contrast resolution and near-maximum light yield, without the spread and loss of light inherent in single-crystal amorphous scintillators.

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