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; K. Kim; B. Raghothamachar; G. Yang; R. B. James

doi:10.1557/opl.2011.1274

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, K. Kim, B. Raghothamachar, G. Yang, R. B. James

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Nuclear Radiation Detection Materials - 2011
Pages	61-65
Number of pages	5
DOIs	https://doi.org/10.1557/opl.2011.1274
Publication status	Published - 2012
Externally published	Yes
Event	2011 MRS Spring Meeting - San Francisco, CA, United States Duration: 2011 Apr 25 → 2011 Apr 29

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1341
ISSN (Print)	0272-9172

Conference

Conference	2011 MRS Spring Meeting
Country	United States
City	San Francisco, CA
Period	11/4/25 → 11/4/29

Keywords

CdZnTe
Crystal defects
Dislocations
Radiation detectors

ASJC Scopus subject areas

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

Access to Document

10.1557/opl.2011.1274

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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

Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors. / Hossain, A.; Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Gul, R.; Kim, K.; Raghothamachar, B.; Yang, G.; James, R. B.

Nuclear Radiation Detection Materials - 2011. 2012. p. 61-65 (Materials Research Society Symposium Proceedings; Vol. 1341).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hossain, A, Bolotnikov, AE, Camarda, GS, Cui, Y, Gul, R, Kim, K, Raghothamachar, B, Yang, G & James, RB 2012, Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors. in Nuclear Radiation Detection Materials - 2011. Materials Research Society Symposium Proceedings, vol. 1341, pp. 61-65, 2011 MRS Spring Meeting, San Francisco, CA, United States, 11/4/25. https://doi.org/10.1557/opl.2011.1274

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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.",

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AB - 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.

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KW - Dislocations

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