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

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

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 (I-V) 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 6 × 10 -3 cm 2/V, which is acceptable for thin detectors, including their application in medicine.

Original languageEnglish
Pages (from-to)1053-1057
Number of pages5
JournalJournal of Electronic Materials
Volume39
Issue number7
DOIs
Publication statusPublished - 2010 Jul
Externally publishedYes

Bibliographical note

Funding Information:
We would like to acknowledge Dr. Zhenxian Liu and Dr. Balaji Raghothamachar for their kind help during the photoluminescence measurements at U2A beamline of NSLS and SWBXT experiments at X19C beamline of NSLS at Brookhaven National Laboratory. This work was supported by the U.S. Department of Energy, Office of Nonproliferation Research and Development, NA-22. The manuscript was authored by Brookhaven Science Associates, LLC under contract no. DE-AC02-98CH1-886 with the U.S. Department of Energy. The U.S. Government retains, and the publisher, by accepting the article for publication, acknowledges, a worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for U.S. Government purposes.

Keywords

  • CMT
  • Detector response
  • Photoluminescence spectra
  • Synchrotron white-beam x-ray topography
  • Twins

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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