Effects of the networks of subgrain boundaries on spectral responses of thick CdZnTe detectors

A. E. Bolotnikov, J. Butcher, G. S. Camarda, Y. Cui, S. U. Egarievwe, P. Fochuk, R. Gul, M. Hamade, A. Hossain, Kihyun Kim, O. V. Kopach, M. Petryk, B. Raghothamachar, G. Yang, R. B. James

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

3 Citations (Scopus)

Abstract

CdZnTe (CZT) crystals used for nuclear-radiation detectors often contain high concentrations of subgrain boundaries and networks of poligonized dislocations that can significantly degrade the performance of semiconductor devices. These defects exist in all commercial CZT materials, regardless of their growth techniques and their vendor. We describe our new results from examining such detectors using IR transmission microscopy and white X-ray beam diffraction topography. We emphasize the roles on the devices' performances of networks of subgrain boundaries with low dislocation densities, such as poligonized dislocations and mosaic structures. Specifically, we evaluated their effects on the gamma-ray responses of thick, >10 mm, CZT detectors. Our findings set the lower limit on the energy resolution of CZT detectors containing dense networks of subgrain boundaries and walls of dislocations.

Original languageEnglish
Title of host publicationHard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII
DOIs
Publication statusPublished - 2011 Nov 2
Externally publishedYes
EventHard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII - San Diego, CA, United States
Duration: 2011 Aug 222011 Aug 24

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8142
ISSN (Print)0277-786X

Conference

ConferenceHard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII
CountryUnited States
CitySan Diego, CA
Period11/8/2211/8/24

Keywords

  • CdZnTe detectors
  • crystal defects
  • virtual Frisch-grid detectors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Effects of the networks of subgrain boundaries on spectral responses of thick CdZnTe detectors'. Together they form a unique fingerprint.

  • Cite this

    Bolotnikov, A. E., Butcher, J., Camarda, G. S., Cui, Y., Egarievwe, S. U., Fochuk, P., Gul, R., Hamade, M., Hossain, A., Kim, K., Kopach, O. V., Petryk, M., Raghothamachar, B., Yang, G., & James, R. B. (2011). Effects of the networks of subgrain boundaries on spectral responses of thick CdZnTe detectors. In Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII [814206] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8142). https://doi.org/10.1117/12.896223