Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors

A. Hossain, A. E. Bolotnikov, G. S. Camarda, Y. Cui, R. Gul, Kihyun Kim, B. Raghothamachar, G. Yang, R. B. James

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The imperfect quality of CdZnTe (CZT) crystals for radiation detectors seriously diminishes their suitability for different applications. Dislocations and other dislocation-related defects, such as sub-grain boundaries and dislocation fields around Te inclusions, engender significant charge losses and, consequently, cause fluctuations in the detector's output signals, thereby hindering their spectroscopic responses. In this paper, we discuss our results from characterizing CZT material by using a high-spatial-resolution X-ray response mapping system at BNL's National Synchrotron Light Source. In this paper, we emphasize the roles of these dislocation-related defects and their contributions in degrading the detector's performance. Specifically, we compare the effects of the sub-grain- and coherent twin-boundaries on the X-ray response maps.

Original languageEnglish
Title of host publicationNuclear Radiation Detection Materials - 2011
Pages61-65
Number of pages5
DOIs
Publication statusPublished - 2012 Feb 20
Externally publishedYes
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2011 Apr 252011 Apr 29

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1341
ISSN (Print)0272-9172

Conference

Conference2011 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period11/4/2511/4/29

Keywords

  • CdZnTe
  • Crystal defects
  • Dislocations
  • Radiation detectors

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Hossain, A., Bolotnikov, A. E., Camarda, G. S., Cui, Y., Gul, R., Kim, K., Raghothamachar, B., Yang, G., & James, R. B. (2012). Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors. In Nuclear Radiation Detection Materials - 2011 (pp. 61-65). (Materials Research Society Symposium Proceedings; Vol. 1341). https://doi.org/10.1557/opl.2011.1274