Cadmium Telluride Detectors

Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) are large band gap semiconductors, presenting a high atomic number Z as well as a high density. This gives them certain advantages over other detectors like :

• Room temperature operation and storage, which means that vacuum and cryostat are no longer necessary, thus avoiding stability problems.

• No high voltage, a biasing in the range of 10-10OV/mm is sufficient.

• Very high efficiency: 2mm absorption depth of CdTe or CdZnTe are equivalent to 10mm of Ge in gamma-ray detection.

• In imaging applications : possibility to associate a large number of detectors or pixels and to distinguish between primary and scattered events.

• Good energy resolution, especially with pixel structures ("pixel effect").

• Low cost

Due to its unique experience in the field of semiconductor detectors (30 years), Eurorad is the only company in the world manufacturing a wide range of CdTe and CdZnTe (H. P.) detectors of planar and hemispherical shapes.  Constellation is a North American distributor for Eurorad detectors.  Click here  to load a PDF file with more detailed information or visit their website here.

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