Correlation between crystal morphology and x-ray performance of a CdZnTe detector

Marcos Bavdaz; Anthony J. Peacock; Seppo Arvo Anter Nenonen; M. A. Jantunen; Mari-Anne A. Gagliardi; Turkka O. Tuomi; K. T. Hjelt; M. Juvonen; R. Rantamaki; Stefan Kraft; Marco Wedowski; Frank Scholze; Gerhard Ulm; Patrick J. McNally; J. Curley; A. N. Danilewsky

doi:10.1117/12.278895

15 October 1997 Correlation between crystal morphology and x-ray performance of a CdZnTe detector

Marcos Bavdaz, Anthony J. Peacock, Seppo Arvo Anter Nenonen, M. A. Jantunen, Mari-Anne A. Gagliardi, Turkka O. Tuomi, K. T. Hjelt, M. Juvonen, R. Rantamaki, Stefan Kraft, Marco Wedowski, Frank Scholze, Gerhard Ulm, Patrick J. McNally, J. Curley, A. N. Danilewsky

Author Affiliations +

Proceedings Volume 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII; (1997) https://doi.org/10.1117/12.278895
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Using a CdZnTe sample detector, a variety of diagnostic tools are applied, so as to assess the crystal characteristics and to compare these to the x-ray response measured with synchrotron radiation. Correlations are found, such that x-ray response degrading processes can be identified. In this respect the performance of the detector is found to be limited by both large scale defects such as some grain boundaries and also pipes and by crystal imperfections, together with impurities and other crystal defects, both at the surface and in the bulk crystal. The relatively soft CdZnTe crystals are very sensitive to improper handling, producing particularly surface damage, which in turn deteriorates the detector performance, as is rather clearly established by photoluminescence measurements.

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Marcos Bavdaz, Anthony J. Peacock, Seppo Arvo Anter Nenonen, M. A. Jantunen, Mari-Anne A. Gagliardi, Turkka O. Tuomi, K. T. Hjelt, M. Juvonen, R. Rantamaki, Stefan Kraft, Marco Wedowski, Frank Scholze, Gerhard Ulm, Patrick J. McNally, J. Curley, and A. N. Danilewsky "Correlation between crystal morphology and x-ray performance of a CdZnTe detector", Proc. SPIE 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, (15 October 1997); https://doi.org/10.1117/12.278895

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