scintillator

scintillator
A substance that emits visible light when hit by a subatomic particle or x- or gamma ray. SEE ALSO: scintillation counter.
- liquid s. a liquid with the properties of a s., in which the substance whose radioactivity is to be measured can be dissolved, to be placed in a well counter.

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scin·til·la·tor 'sint-əl-.āt-ər n
1) a phosphor in which scintillations occur (as in a scintillation counter)
2) a device for sending out scintillations of light
3) SCINTILLATION COUNTER

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n.
a substance that produces a fluorescent flash when struck by high-energy radiation, such as beta or gamma rays. In medicine the most commonly used scintillator is a crystal of thallium-activated sodium iodide, which forms the basis of a gamma camera. See also scintigram.

Medical dictionary. 2011.

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