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Proceedings Paper

CZT pixel detectors equipped with effective Ohmic contacts; their spectroscopic performance and the enigma of why they thus behave
Author(s): Uri El-Hanany; Allon Shahar; A. Tsigelman
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Paper Abstract

The performance of CZT pixel detectors, with dedicated ICs and electronic processors, have been demonstrated. These nuclear imaging modules, developed primarily for the medical market, may be utilized for other applications, such as large area nuclear spectrometers. An improved crystal growth technique ensures a practical supply of wafers of which high performance detectors are fabricated. We believe that the high spectroscopic quality of these detectors stems from their effective Ohmic behavior, coupled with the geometrical, 'small pixel' effect. The Ohmic operation of these detectors has been described in a schematic way only, where the detailed non-equilibrium mechanism, responsible for it, still remains to be explained in detail. The IMARAD detector type 2, with contacts which strongly limit the dark current, exhibit even improved spectroscopic behavior, due to a dynamic Ohmic behavior of these contacts.

Paper Details

Date Published: 19 October 1999
PDF: 13 pages
Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); doi: 10.1117/12.366605
Show Author Affiliations
Uri El-Hanany, IMARAD Imaging Systems Ltd. (Israel)
Allon Shahar, IMARAD Imaging Systems Ltd. (Israel)
A. Tsigelman, IMARAD Imaging Systems Ltd. (Israel)


Published in SPIE Proceedings Vol. 3768:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics
Ralph B. James; Richard C. Schirato, Editor(s)

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