What are CZT detectors?
Advatech UK Ltd: Overview of how CZT detectors work. 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. These semiconductor detectors create internal charges when exposed to photon interactions.
How do CZT detectors work?
CZT the principles of operation CZT detectors are fabricated with very thin metalized electrode geometries deposited on the detector surfaces. These electrodes are then electrically biased creating a difference in electrical potential within the detector volume.
What CZT?
Cadmium zinc telluride, (CdZnTe) or CZT, is a compound of cadmium, zinc and tellurium or, more strictly speaking, an alloy of cadmium telluride and zinc telluride.
Is CZT a semiconductor?
Cadmium zinc telluride (CdZnTe, or CZT) is a room-temperature semiconductor radiation detector that has been developed in recent years for a variety of applications. CZT has been investigated for many potential uses in medical imaging, especially in the field of single photon emission computed tomography (SPECT).
What is a CZT camera?
In the past few years, myocardial perfusion imaging has significantly evolved with the development of semiconductor cadmium-zinc-telluride (CZT) cameras, leading to a technological jump in this setting. This percentage is twofold lower for the Discovery CZT camera, and 7- to 8-fold lower for conventional Anger cameras.
How does a high purity germanium detector work?
HPGe Detector – Principle of Operation Ionizing radiation enters the sensitive volume (germanium crystal) of the detector and interacts with the semiconductor material. High-energy photon passing through the detector ionizes the atoms of semiconductor, producing the electron-hole pairs.
What is a high purity germanium detector?
Synopsis: High Purity Germanium (HPGe) is the only radiation detection technology that provides sufficient information to accurately and reliably identify radionuclides from their passive gamma ray emissions. HPGe detectors have a 20-30x improvement in resolution as compared to that of Sodium Iodide (NaI) detectors.
What are the three types of semiconductor detectors?
Contents
- 2.1 Silicon detectors.
- 2.2 Diamond detectors.
- 2.3 Germanium detectors.
- 2.4 Cadmium telluride and cadmium zinc telluride detectors.
What devices detect gamma rays?
Gamma rays can be detected by radiation monitoring devices. NNSA deploys radiation portal monitors and other types of devices to find material that could be used in a nuclear weapon or dirty bomb.
What kind of radiation detector can CZT be used for?
Cadmium zinc telluride (CZT) has proven to be a valuable material for high-resolution, high detection-efficiency, room-temperature radiation detectors that can achieve a spectroscopic resolution of <1% full-width half maximum (FWHM).
How is CZT different from silicon and germanium detectors?
CZT is a unique semiconductor compared with silicon and germanium detectors – cadmium zinc telluride CZT operates at room temperature and can process >2million photons / second /mm2. Additionally, CZT’s spectroscopic resolution clearly outperforms any commercially available scintillator.
What does cadmium zinc telluride CZT stand for?
Cadmium zinc telluride CZT (sometimes written as CdZnTe) is a room temperature semiconductor that directly converts x-ray or gamma photons into electrons and holes.
What kind of detectors use cadmium zinc telluride?
CZT Detector. Cadmium Zinc Telluride (CdZnTe or CZT) is a new semiconductor, which enables to convert radiation to electron effectively, it is mainly used in infrared thin-film epitaxy substrate, X-ray detectors and Gamma-ray CdZnTe detectors.
