TY - GEN
T1 - Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors
AU - Hossain, A.
AU - Bolotnikov, A. E.
AU - Camarda, G. S.
AU - Cui, Y.
AU - Gul, R.
AU - Kim, K.
AU - Raghothamachar, B.
AU - Yang, G.
AU - James, R. B.
N1 - Funding Information:
This work was supported by U.S. Department of Energy, Office of Nonproliferation Research and Development, NA-22, and the Defense Threat Reduction Agency (DTRA).
PY - 2012
Y1 - 2012
N2 - 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.
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.
KW - CdZnTe
KW - Crystal defects
KW - Dislocations
KW - Radiation detectors
UR - http://www.scopus.com/inward/record.url?scp=84863163049&partnerID=8YFLogxK
U2 - 10.1557/opl.2011.1274
DO - 10.1557/opl.2011.1274
M3 - Conference contribution
AN - SCOPUS:84863163049
SN - 9781605113180
T3 - Materials Research Society Symposium Proceedings
SP - 61
EP - 65
BT - Nuclear Radiation Detection Materials - 2011
T2 - 2011 MRS Spring Meeting
Y2 - 25 April 2011 through 29 April 2011
ER -