碲化锌镉

碲化镉锌 （英语：Cadmium zinc telluride）（CdZnTe）或CZT是镉、锌和碲的化合物，或者更严格地说，是碲化镉和碲化锌的合金。它是一种直接带隙半导体，可用于多种应用，包括半导体探测器（英语：Semiconductor detector）、光折变光栅、电光调制器（英语：Electro-optic modulator）、太阳能电池以及太赫兹产生和检测。带隙约为 1.4 至 2.2 eV，具体取决于成分^[1]。

特征[编辑]

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%.

使用碲化镉锌 (CZT) 的辐射探测器可以在室温下以直接转换（或光电导）模式运行，这与一些需要冷却的其他材料（特别是锗）不同。它们的相对优势包括由于镉和碲的高原子序数而对X射线和伽马射线具有高灵敏度，以及比闪烁体探测器更好的能量分辨率^[2]。碲化镉锌可以形成不同的形状，以适应不同的辐射检测应用，并且已经开发了各种电极几何形状，例如共面网格^[3] 和小像素探测器^[4]，以提供单极（仅电子）操作，从而提高能量分辨率。 1 cm³ CZT 晶体的灵敏度范围为 30 keV 至 3 MeV，在 662 keV 时具有 2.5% FWHM 能量分辨率^[5]。

参见[编辑]

参考资料[编辑]

^ Capper, Peter. Properties of Narrow Gap Cadmium-based Compounds. INSPEC. 1994: 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. Small pixel CZT detector for hard X-ray spectroscopy. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2011, 652 (1): 158–161. Bibcode:2011NIMPA.652..158W. doi:10.1016/j.nima.2011.01.144.
^ Luke, P.N. Unipolar charge sensing with coplanar electrodes -- application to semiconductor detectors. IEEE Transactions on Nuclear Science. 1995, 42 (4): 207–213 [2023-08-24]. Bibcode:1995ITNS...42..207L. S2CID 64754800. doi:10.1109/23.467848. （原始内容存档于2023-05-24）.
^ 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. Pixellated Cd(Zn)Te high-energy X-ray instrument. Journal of Instrumentation. 2011, 6 (12): C12009. Bibcode:2011JInst...6C2009S. PMC 3378031 . PMID 22737179. doi:10.1088/1748-0221/6/12/C12009.
^ Verbelen, Yannick; Martin, Peter G.; Ahmad, Kamran; Kaluvan, Suresh; Scott, Thomas B. Miniaturised Low-Cost Gamma Scanning Platform for Contamination Identification, Localisation and Characterisation: A New Instrument in the Decommissioning Toolkit. Sensors. 2021, 21 (8): 2884. Bibcode:2021Senso..21.2884V. PMC 8074328 . PMID 33924123. doi:10.3390/s21082884 .

外部链接[编辑]

（英文）National Pollutant Inventory - Cadmium and compounds

[1] Capper, Peter. Properties of Narrow Gap Cadmium-based Compounds. INSPEC. 1994: 618. ISBN 0-85296-880-9.

[2] Wilson, Matthew David; Cernik, Robert; Chen, Henry; Hansson, Conny; Iniewski, Kris; Jones, Lawrence L.; Seller, Paul; Veale, Matthew C. Small pixel CZT detector for hard X-ray spectroscopy. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2011, 652 (1): 158–161. Bibcode:2011NIMPA.652..158W. doi:10.1016/j.nima.2011.01.144.

[3] Luke, P.N. Unipolar charge sensing with coplanar electrodes -- application to semiconductor detectors. IEEE Transactions on Nuclear Science. 1995, 42 (4): 207–213 [2023-08-24]. Bibcode:1995ITNS...42..207L. S2CID 64754800. doi:10.1109/23.467848. （原始内容存档于2023-05-24）.

[4] 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. Pixellated Cd(Zn)Te high-energy X-ray instrument. Journal of Instrumentation. 2011, 6 (12): C12009. Bibcode:2011JInst...6C2009S. PMC 3378031 . PMID 22737179. doi:10.1088/1748-0221/6/12/C12009.

[5] Verbelen, Yannick; Martin, Peter G.; Ahmad, Kamran; Kaluvan, Suresh; Scott, Thomas B. Miniaturised Low-Cost Gamma Scanning Platform for Contamination Identification, Localisation and Characterisation: A New Instrument in the Decommissioning Toolkit. Sensors. 2021, 21 (8): 2884. Bibcode:2021Senso..21.2884V. PMC 8074328 . PMID 33924123. doi:10.3390/s21082884 .

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