3 February 2004 Measurements of spectral and position resolution on 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 interesting astrophysical application is their use as focal plane detectors for multilayer hard X-ray telescopes operating in the 15 - 70 keV energy band. Here we report on results obtained using a 16 x 16 CZT pixel detector (10 x 10 x 1 mm3 single crystal) with 500 μm pixels operated at room temperature using standard commercial electronics. The results clearly show that the use of small pixels is effective in reducing one of the major drawbacks of CZT planar detectors i.e. the considerable amount of charge loss, due to hole trapping, which gives rise to a reduced energy resolution and a low energy tail in the pulse-height spectra.
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Stefano Del Sordo, Stefano Del Sordo, Gaetano Agnetta, Gaetano Agnetta, B. Biondo, B. Biondo, Ezio Caroli, Ezio Caroli, Filippo Celi, Filippo Celi, Ariano Donati, Ariano Donati, Salvatore Giarrusso, Salvatore Giarrusso, A. Mangano, A. Mangano, R. Montanti, R. Montanti, Francesco Russo, Francesco Russo, Filomena Schiavone, Filomena Schiavone, John Buchan Stephen, John Buchan Stephen, M. Strazzeri, M. Strazzeri, Giulio Ventura, Giulio Ventura, Giovanni Pareschi, Giovanni Pareschi, L. Abbene, L. Abbene, Francesco Fauci, Francesco Fauci, Giuseppe Raso, Giuseppe Raso, V. Radicci, V. Radicci, S. Tangaro, S. Tangaro, Piernicola Oliva, Piernicola Oliva, Simone Stumbo, Simone Stumbo, } "Measurements of spectral and position resolution on a 16x16 pixel CZT imaging hard x-ray detector", Proc. SPIE 5165, X-Ray and Gamma-Ray Instrumentation for Astronomy XIII, (3 February 2004); doi: 10.1117/12.508283; https://doi.org/10.1117/12.508283
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