Characterization of a large-volume multi-element CdZnTe detector

Thomas H. Prettyman; Michael C. Browne; Kiril D. Ianakiev; Calvin E. Moss; Stephen E. Soldner

doi:10.1117/12.407567

21 November 2000 Characterization of a large-volume multi-element CdZnTe detector

Thomas H. Prettyman, Michael C. Browne, Kiril D. Ianakiev, Calvin E. Moss, Stephen E. Soldner

Proceedings Volume 4141, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics II; (2000) https://doi.org/10.1117/12.407567
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

In this paper, we present results of experiments to characterize a large-volume (4 cm³), multi-element CdZnTe detector for high-efficiency, gamma-ray spectroscopy. The module includes an array of eight 0.5 cm³ coplanar grid detectors manufactured by eV Products. An eight-channel data acquisition system with list mode output is used to record gamma-ray events for each detector in the array. The list mode data are analyzed to determine the efficiency for coincidence events and to demonstrate different modes of operation (e.g., Compton suppression). The total efficiency of the array is found to match Monte Carlo calculations to within a few percent; however, the full-energy (photopeak) efficiency is significantly lower than predicted by Monte Carlo. The observed difference is probably caused by a combination of electrode design and charge transport properties. Approaches to improve full-energy efficiency are proposed.

Citation Download Citation

Thomas H. Prettyman, Michael C. Browne, Kiril D. Ianakiev, Calvin E. Moss, and Stephen E. Soldner "Characterization of a large-volume multi-element CdZnTe detector", Proc. SPIE 4141, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics II, (21 November 2000); https://doi.org/10.1117/12.407567

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