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Cadmium telluride (CdTe) is a stable crystalline compound composed from cadmium and tellurium. Doped with a small amount of Zn it produces cadmium zinc telluride, (CdZnTe) or CZT.
CdTe and CdZnTe pixel detectors are implementing in imaging systems which are widely used in medical diagnostics (mammography, dental phantoms), astronomy, and industrial research.
CdTe and CdZnTe pixel detectors are very appealing due to their high energy resolution at normal conditions which is not high enough in currently implementing materials [4, 1]. Another advantage of those detectors is their perfect efficiency while working with X-ray energy spectrum as well as compatibility with gamma rays, alpha and beta particles [5, 3].
Nowadays, there are two ways of using CdTe/CZT detectors. The first one is focused on single channel detectors which are used in X- and gamma- ray spectroscopy. The second is proposed for multi-channel devices in nuclear medicine mostly. [5, 26]
Silicon radiation detectors characteristics
- What is a typical transfer function for your sensor type?
- Can you describe it mathematically or is it more experimental, measured data?
- What is your sensor's typical value for sensitivity?
- How the sensitivity could be improved?
- What are the other characteristics of your sensor?
Development in Finland
Today there are two big companies which implement CdTe/CZT detectors in Finland.
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