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Sapphire Substrates for Micro- and OptoelectronicsDetails
Semiconductor Gamma-Ray Detectors
Semiconductor detectors based on CZT crystals provide direct conversion of radiation energy into an electrical signal. They are compact (< 1 cm3) and successfully operate at the room temperature without requiring of the liquid nitrogen cooling, but they have an energy resolution in the gamma-ray spectrometry, which is close to the germanium detectors.
The crystals of Cd1-XZnXTe (CZT) (x≈0,1) is an effective material for registration of ionizing (mainly gamma-) radiation when solving the problems of radiation monitoring, medical testing, pollutions of the environment monitoring, as well as for use in space technology and astronomy.
Manufactured in the Institute for single crystals semiconductor detectors based on crystals of Cd1-XZnXTe provide direct conversion of radiation energy into an electrical signal. They are compact (< 1 cm3) and successfully operate at the room temperatures without requiring liquid nitrogen cooling as germanium detectors. Nevertheless, the use of the special methods when charge collecting and output handling allows to achieve the parameters of the energy resolution in gamma-ray spectrometry, close to the germanium detectors.
| Useful capacity|| 0.001...1 cm3|
| Energy range|| 5 keV...1.5 MeV|
| Dynamic range of exposure dose rate|| 10 μR/h...1 R/h|
|Energy resolution on 137Cs||< 6%|
| Energy resolution on 241Am||< 10%|
| Detection efficiency at 60 keV (detector thickness 2 mm)||99.27%|
| Operation temperature range|| -40...+50 C°|
|Bias|| 10...1000 V |
| Electrical resistivity|| 1010...1011 Ohm/cm |
| Maximum size|| 10x10x10 mm3|
|Contacts type and material||planar, Au or In|