29 September 2004 Spectroscopic performances and electron transport properties in a 16x16-pixel CZT imaging hard-X-ray detector
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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.
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Stefano Del Sordo, Stefano Del Sordo, M. Strazzeri, M. Strazzeri, Gaetano Agnetta, Gaetano Agnetta, B. Biondo, B. Biondo, Filippo Celi, Filippo Celi, Salvatore Giarrusso, Salvatore Giarrusso, A. Mangano, A. Mangano, Francesco Russo, Francesco Russo, M. Zora, M. Zora, Ezio Caroli, Ezio Caroli, Ariano Donati, Ariano Donati, Filomena Schiavone, Filomena Schiavone, John Buchan Stephen, John Buchan Stephen, Giulio Ventura, Giulio Ventura, L. Abbene, L. Abbene, Francesco Fauci, Francesco Fauci, Giuseppe Raso, Giuseppe Raso, Giovanni Pareschi, 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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