CdZnTe x-ray detector for 30 {endash} 100 keV energy

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High-pressure-Bridgman (HPB) grown CdZnTe x-ray detectors 1.25-1.7 mm thick were tested using monochromatic x-rays of 30 to 100 keV generated by a high energy x-ray generator. The results were compared with a commercially available 5 cm thick NaI detector. A linear dependence of the counting rate versus the x-ray generator tube current was observed at 58.9 keV. The measured pulse height of the photopeaks shows a linear dependence on energy. Electron and hole mobility-lifetime products ({mu}{tau}) were deduced by fitting bias dependent photopeak channel numbers at 30 keV x-ray energy. Values of 2 x 10{sup -3} cm{sup 2}/V and 2 ... continued below

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8 p.

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Yoo, S.-S.; Rodricks, B.; Shastri, S.D. & Montano, P.A. July 1, 1996.

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Description

High-pressure-Bridgman (HPB) grown CdZnTe x-ray detectors 1.25-1.7 mm thick were tested using monochromatic x-rays of 30 to 100 keV generated by a high energy x-ray generator. The results were compared with a commercially available 5 cm thick NaI detector. A linear dependence of the counting rate versus the x-ray generator tube current was observed at 58.9 keV. The measured pulse height of the photopeaks shows a linear dependence on energy. Electron and hole mobility-lifetime products ({mu}{tau}) were deduced by fitting bias dependent photopeak channel numbers at 30 keV x-ray energy. Values of 2 x 10{sup -3} cm{sup 2}/V and 2 x 10{sup -4}cm{sup 2}/V were obtained for {mu}{tau}{sub e} and {mu}{tau}{sub p}, respectively. The detector efficiency of CdZnTe at a 100 V bias was as high as, or higher than 90 % compared to a NaI detector. At x-ray energies higher than 70 keV, the detection efficiency becomes a dominant factor and decreases to 75 % at 100 keV.

Physical Description

8 p.

Notes

OSTI as DE96014399

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  • Denver `96: 1. conference on space processing of materials, at SPIE International Society for Optical Engineering (SPIE) annual international symposium on optical science, engineering, and instrumentation, Denver, CO (United States), 4-9 Aug 1996

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  • Other: DE96014399
  • Report No.: ANL/MSD/CP--90960
  • Report No.: CONF-960848--18
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 397089
  • Archival Resource Key: ark:/67531/metadc677397

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  • July 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 14, 2015, 6:28 p.m.

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Yoo, S.-S.; Rodricks, B.; Shastri, S.D. & Montano, P.A. CdZnTe x-ray detector for 30 {endash} 100 keV energy, article, July 1, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc677397/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.