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Cadmium Zinc Telluride (CZT) achieves excellent spatial resolution and good energy resolution over the broad energy range from several keV into the MeV energy range. In this paper we present the results of a systematic study of the performance of CZT detectors manufacturered by Orbotech (before IMARAD) depending on surface preparation, contact materials and contact deposition. The standard Orbotech detectors have the dimension of 2.0×2.0×0.5 cm. They have a pixellated In anode with 8×8 pixels and a monolithic In cathode. Using the same CZT substrates several times, we have made a direct comparison of the performance of different contact materials by replacing the cathode and/or the anode contacts with several high- workfunction metals. We present the performance of the detectors and conclude with an overview over our ongoing detector optimization.
I. Jung,M. Groza,J. Perkins,H. Krawczynski, andA. Burger
"Direct comparison of the performance of CZT detectors contacted with various metals", Proc. SPIE 5922, Hard X-Ray and Gamma-Ray Detector Physics VII, 592202 (16 September 2005); https://doi.org/10.1117/12.617749
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I. Jung, M. Groza, J. Perkins, H. Krawczynski, A. Burger, "Direct comparison of the performance of CZT detectors contacted with various metals," Proc. SPIE 5922, Hard X-Ray and Gamma-Ray Detector Physics VII, 592202 (16 September 2005); https://doi.org/10.1117/12.617749