A YanDavos radiation sensor system based on a 1 cm3 CZT crystal, deployed on a Boston Dynamics Spot quadruped robot for radiation mapping in the Chernobyl Exclusion ZoneA Cs-137 gamma-ray spectrum collected using an M400 pixelated CZT imaging spectrometer. Energy resolution, as measured by full-width-at-half-maximum (FWHM), is better than 1%.
Radiation detectors using CZT can operate in direct-conversion (or photoconductive) mode at room temperature, unlike some other materials (particularly germanium) which require cooling. Their relative advantages include high sensitivity for X-rays and gamma rays, due to the high atomic numbers of Cd and Te, and better energy resolution than scintillator detectors.[2] CZT can be formed into different shapes for different radiation-detecting applications, and a variety of electrode geometries, such as coplanar grids [3] and small pixel detectors,[4] have been developed to provide unipolar (electron-only) operation, thereby improving energy resolution. A 1 cm3 CZT crystal has a sensitivity range of 30 keV to 3 MeV with a 2.5% FWHM energy resolution at 662 keV.[5] Pixelated CZT with a volume of 6 cm3 can achieve 0.71% FWHM energy resolution at 662 keV and perform Compton imaging.[6]
^Capper, Peter (1994). Properties of Narrow Gap Cadmium-based Compounds. INSPEC. p. 618. ISBN0-85296-880-9.
^Wilson, Matthew David; Cernik, Robert; Chen, Henry; Hansson, Conny; Iniewski, Kris; Jones, Lawrence L.; Seller, Paul; Veale, Matthew C. (2011). "Small pixel CZT detector for hard X-ray spectroscopy". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 652 (1): 158–161. Bibcode:2011NIMPA.652..158W. doi:10.1016/j.nima.2011.01.144.
^Luke, P.N. (1995). "Unipolar charge sensing with coplanar electrodes -- application to semiconductor detectors". IEEE Transactions on Nuclear Science. 42 (4): 207–213. Bibcode:1995ITNS...42..207L. doi:10.1109/23.467848. S2CID 64754800.
^Seller, P.; Bell, S.; Cernik, R. J.; Christodoulou, C.; Egan, C. K.; Gaskin, J. A.; Jacques, S.; Pani, S.; Ramsey, B. D.; Reid, C.; Sellin, P. J.; Scuffham, J. W.; Speller, R. D.; Wilson, M. D.; Veale, M. C. (2011). "Pixellated Cd(Zn)Te high-energy X-ray instrument". Journal of Instrumentation. 6 (12): C12009. Bibcode:2011JInst...6C2009S. doi:10.1088/1748-0221/6/12/C12009. PMC3378031. PMID 22737179.
^Verbelen, Yannick; Martin, Peter G.; Ahmad, Kamran; Kaluvan, Suresh; Scott, Thomas B. (2021). "Miniaturised Low-Cost Gamma Scanning Platform for Contamination Identification, Localisation and Characterisation: A New Instrument in the Decommissioning Toolkit". Sensors. 21 (8): 2884. Bibcode:2021Senso..21.2884V. doi:10.3390/s21082884. PMC8074328. PMID 33924123.
^Zhang, Feng; Herman, Cedric; He, Zhong; De Geronimo, Gianluigi; Vernon, Emerson; Fried, Jack (2012). "Characterization of the H3D ASIC Readout System and 6.0 cm³ 3-D Position Sensitive CdZnTe Detectors". IEEE Transactions on Nuclear Science. 59 (1): 236. Bibcode:2012ITNS...59..236Z. doi:10.1109/TNS.2011.2175948. S2CID 16381112.
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February 16, 2024
cadmium, zinc, telluride, cdznte, compound, cadmium, zinc, tellurium, more, strictly, speaking, alloy, cadmium, telluride, zinc, telluride, direct, bandgap, semiconductor, used, variety, applications, including, semiconductor, radiation, detectors, photorefrac. 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 A direct bandgap semiconductor it is used in a variety of applications including semiconductor radiation detectors photorefractive gratings electro optic modulators solar cells and terahertz generation and detection The band gap varies from approximately 1 4 to 2 2 eV depending on composition 1 Contents 1 Characteristics 2 See also 3 References 4 External linksCharacteristics edit nbsp A YanDavos radiation sensor system based on a 1 cm3 CZT crystal deployed on a Boston Dynamics Spot quadruped robot for radiation mapping in the Chernobyl Exclusion Zone nbsp A Cs 137 gamma ray spectrum collected using an M400 pixelated CZT imaging spectrometer Energy resolution as measured by full width at half maximum FWHM is better than 1 Radiation detectors using CZT can operate in direct conversion or photoconductive mode at room temperature unlike some other materials particularly germanium which require cooling Their relative advantages include high sensitivity for X rays and gamma rays due to the high atomic numbers of Cd and Te and better energy resolution than scintillator detectors 2 CZT can be formed into different shapes for different radiation detecting applications and a variety of electrode geometries such as coplanar grids 3 and small pixel detectors 4 have been developed to provide unipolar electron only operation thereby improving energy resolution A 1 cm3 CZT crystal has a sensitivity range of 30 keV to 3 MeV with a 2 5 FWHM energy resolution at 662 keV 5 Pixelated CZT with a volume of 6 cm3 can achieve 0 71 FWHM energy resolution at 662 keV and perform Compton imaging 6 See also editScintillator cadmium telluride zinc telluride Telluride chemistry References edit Capper Peter 1994 Properties of Narrow Gap Cadmium based Compounds INSPEC p 618 ISBN 0 85296 880 9 Wilson Matthew David Cernik Robert Chen Henry Hansson Conny Iniewski Kris Jones Lawrence L Seller Paul Veale Matthew C 2011 Small pixel CZT detector for hard X ray spectroscopy Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 652 1 158 161 Bibcode 2011NIMPA 652 158W doi 10 1016 j nima 2011 01 144 Luke P N 1995 Unipolar charge sensing with coplanar electrodes application to semiconductor detectors IEEE Transactions on Nuclear Science 42 4 207 213 Bibcode 1995ITNS 42 207L doi 10 1109 23 467848 S2CID 64754800 Seller P Bell S Cernik R J Christodoulou C Egan C K Gaskin J A Jacques S Pani S Ramsey B D Reid C Sellin P J Scuffham J W Speller R D Wilson M D Veale M C 2011 Pixellated Cd Zn Te high energy X ray instrument Journal of Instrumentation 6 12 C12009 Bibcode 2011JInst 6C2009S doi 10 1088 1748 0221 6 12 C12009 PMC 3378031 PMID 22737179 Verbelen Yannick Martin Peter G Ahmad Kamran Kaluvan Suresh Scott Thomas B 2021 Miniaturised Low Cost Gamma Scanning Platform for Contamination Identification Localisation and Characterisation A New Instrument in the Decommissioning Toolkit Sensors 21 8 2884 Bibcode 2021Senso 21 2884V doi 10 3390 s21082884 PMC 8074328 PMID 33924123 Zhang Feng Herman Cedric He Zhong De Geronimo Gianluigi Vernon Emerson Fried Jack 2012 Characterization of the H3D ASIC Readout System and 6 0 cm 3 D Position Sensitive CdZnTe Detectors IEEE Transactions on Nuclear Science 59 1 236 Bibcode 2012ITNS 59 236Z doi 10 1109 TNS 2011 2175948 S2CID 16381112 External links editNational Pollutant Inventory Cadmium and compounds Retrieved from https en wikipedia org w index php title Cadmium zinc telluride amp oldid 1172005070, wikipedia, wiki, book, books, library,
