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arxiv: 0811.3201 · v1 · submitted 2008-11-19 · 🌌 astro-ph

Fabrication and Test of Pixelated CZT Detectors with Different Pixel Pitches and Thicknesses

Q. Li (1) , A. Garson (1) , P. Dowkontt (1) , J. Martin (1) , M. Beilicke (1) , I. Jung (2) , M. Groza (3) , A. Burger (3)
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G. De Geronimo (4) H. Krawczynski (1) (1). (Department of Physics Washington University in St. Louis St. Louis MO USA) (2). (Physik. Inst. Universitat Erlangen-Nurnberg Erlangen Germany) (3). (Department of Physics Fisk University Nashville TN USA) (4). (Instrumentation Devision Brookhaven National Laboratory Upton NY USA)
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keywords detectorsbeenbridgmandetectordifferenthighpixelproducts
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The main methods grown Cadmium Zinc Telluride (CZT) crystals with high yield and excellent homogeneity are Modified Horizontal Bridgman (MHB) and High Pressure Bridgman (HPB) processes, respectively. In this contribution, the readout system based on two 32-channel NCI-ASICs for pixellated CZT detector arrays has been developed and tested. The CZT detectors supplied by Orbotech (MHB) and eV products (HPB) are tested by NCI-ASIC readout system. The CZT detectors have an array of 8x8 or 11x11 pixel anodes fabricated on the anode surface with the area up to 2 cm x2 cm and the thickness of CZT detectors ranges from 0.5 cm to 1 cm. Energy spectra resolution and electron mobility-lifetime products of 8x8 pixels CZT detector with different thicknesses have been investigated.

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