Journal of Electronic Materials

, Volume 39, Issue 7, pp 1053–1057

Investigation of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection

  • G. Yang
  • A. E. Bolotnikov
  • L. Li
  • G. S. Camarda
  • Y. Cui
  • A. Hossain
  • K. Kim
  • V. Carcelen
  • R. Gul
  • R. B. James
Article

Cadmium manganese telluride (CMT) has high potential as a material for room-temperature nuclear-radiation detectors. We investigated indium-doped CMT crystals taken from the stable growth region of the ingot and compared its characteristics with that from the last-to-freeze region. We employed different techniques, including synchrotron white-beam x-ray topography (SWBXT), current–voltage (IV) measurement, and low-temperature photoluminescence spectra, and we also assessed their responses as detectors of radiation exposure. The crystal from the stable growth region proved to be superior to that from the last-to-freeze region; it is a single-grain crystal, free of twins, and displayed a resistivity higher by one order of magnitude. The segregation of indium dopant in the ingot might be responsible for its better resistivity. Furthermore, we recorded a good response in the detector fabricated from the crystal taken from the stable growth region; its (μτ)e value was 2.6 × 10−3 cm2/V, which is acceptable for thin detectors, including their application in medicine.

Keywords

CMT synchrotron white-beam x-ray topography photoluminescence spectra detector response twins 

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Copyright information

© TMS 2010

Authors and Affiliations

  • G. Yang
    • 1
  • A. E. Bolotnikov
    • 1
  • L. Li
    • 2
  • G. S. Camarda
    • 1
  • Y. Cui
    • 1
  • A. Hossain
    • 1
  • K. Kim
    • 1
  • V. Carcelen
    • 1
    • 3
  • R. Gul
    • 1
    • 4
  • R. B. James
    • 1
  1. 1.Brookhaven National LaboratoryUptonUSA
  2. 2.Yinnel Tech, Inc.South BendUSA
  3. 3.Laboratorio de Crecimiento de Cristales, Dpto. Fisica de Materiales, Facultad de CienciasUniversity Autonoma de MadridMadridSpain
  4. 4.Idaho State UniversityPocatelloUSA

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