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radiation measurement (technology) :: Semiconductor detectors -- Britannica Online Encyclopedia
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radiation measurement

Semiconductor detectors

When a charged particle loses its energy in a solid rather than a gas, processes similar to ionization and excitation also take place. In most solids or liquids, however, the resulting electrical charges cannot be transported over appreciable distances and thus cannot serve as the basis of an electrical signal. There is one category of solids that are an exception. These are semiconductor materials, of which silicon and germanium are the predominant examples. In these materials, charges created by radiation can be collected efficiently over distances of many centimetres.

The electronic structure of semiconductors is such that, ... (100 of 18329 words)

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