![]() Compton Scattering: where an absorbed photon transfers a fraction of its energy to an atomic electron to produce an ‘hot’ electron and a degraded photon.Photoelectric Absorption: where an absorbed photon transfers all its energy to an atomic electron.There are three effects which are important: These charges can be collected by the application of an external electric field. These semiconductor detectors create internal charges when exposed to photon interactions. CZT (and CadmiumTelluride) has attracted particular interest as a detector for both X and gamma rays. Traditional semiconductors, such as silicon (Si) and germanium (Ge) have been used f o r many years as radiation detectors, but compound semiconductors, comprising of two or more elements,with their range of phy sical properties (band gap, atomic number and density) have been investigated for many years as alternatives. Cadmium Zinc Telluride (commonly known as CdZnTe or CZT) is a semiconductor that, at room temperature, directly converts x-ray or gamma-ray photons into electrons.
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