29 September 2004 Spectroscopic performances and electron transport properties in a 16x16-pixel CZT imaging hard-X-ray detector
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Abstract
Cadmium zinc telluride (CZT) pixel detectors show very good spectral and spatial resolution and are suitable for use in compact hard X-ray sensors operated without cryogenics. One of the more appealing astrophysical applications is their use as focal plane detectors for multilayer hard X-ray telescopes operating in the (10 - 80) keV energy band. This paper reports experimental results obtained from two 16x16 pixellated CZT detectors (10x10x1 mm3 and 10x10x2 mm3 single crystals) with 450x450 μm2 pixel operated at room temperature using standard commercial read-out electronics. We have investigated about energy resolution and material properties of both detectors. Both arrays gave similar results showing an energy resolution less then 5%@59.5 keV and a good material uniformity. The good energy resolution of both detectors demonstrates as the pixellated anode structure reduces (small pixel effect) the incomplete charge collection due to severe hole trapping typically presents in CZT crystals. A calibration curve, obtained using three different energies, shows a linear response of the detectors.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stefano Del Sordo, M. Strazzeri, Gaetano Agnetta, B. Biondo, Filippo Celi, Salvatore Giarrusso, A. Mangano, Francesco Russo, M. Zora, Ezio Caroli, Ariano Donati, Filomena Schiavone, John Buchan Stephen, Giulio Ventura, L. Abbene, Francesco Fauci, Giuseppe Raso, Giovanni Pareschi, "Spectroscopic performances and electron transport properties in a 16x16-pixel CZT imaging hard-X-ray detector", Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.550033; https://doi.org/10.1117/12.550033
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