Room-temperature performance of 3 mm-thick cadmium-zinc-telluride pixel detectors with sub-millimetre pixelization
| Autor: | Matthew C. Veale, Manuele Bettelli, Andrea Zappettini, O J L Fox, Gaetano Gerardi, Paul Seller, Fabio Principato, Kawal Sawhney, Leonardo Abbene, Antonino Buttacavoli, Nicola Sarzi Amadè |
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| Přispěvatelé: | Buttacavoli A., Principato F., Gerardi G., Bettelli M., Sarzi Amade N., Zappettini A., Seller P., Veale M.C., Fox O., Sawhney K., Abbene L. |
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena 02 engineering and technology 01 natural sciences Dot pitch Collimated light law.invention Charge sharing chemistry.chemical_compound Optics law 0103 physical sciences Instrumentation 010302 applied physics X-ray and gamma ray detectors CdZnTe pixel detectors charge sharing charge losses charge-sharing correction spectroscopic X-ray imaging Radiation Pixel business.industry Settore FIS/01 - Fisica Sperimentale Detector CdZnTe pixel detectors charge losses charge sharing charge-sharing correction spectroscopic X-ray imaging X-ray and gamma ray detectors 021001 nanoscience & nanotechnology Settore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin) Synchrotron Cadmium zinc telluride chemistry 0210 nano-technology Pixelization business |
| Zdroj: | Journal of synchrotron radiation 27 (2020): 1180–1189. doi:10.1107/S1600577520008942 info:cnr-pdr/source/autori:Buttacavoli A.; Principato F.; Gerardi G.; Bettelli M.; Amade N.S.; Zappettini A.; Seller P.; Veale M.C.; Fox O.; Sawhney W.; Abbene L./titolo:Room-temperature performance of 3 mm-thick cadmium zinc telluride pixel detectors with sub-millimetre pixelization/doi:10.1107%2FS1600577520008942/rivista:Journal of synchrotron radiation/anno:2020/pagina_da:1180/pagina_a:1189/intervallo_pagine:1180–1189/volume:27 |
| ISSN: | 1600-5775 |
| DOI: | 10.1107/S1600577520008942 |
| Popis: | Cadmium–zinc–telluride (CZT) pixel detectors represent a consolidated choice for the development of room-temperature spectroscopic X-ray imagers, finding important applications in medical imaging, often as detection modules of a variety of new SPECT and CT systems. Detectors with 3–5 mm thicknesses are able to efficiently detect X-rays up to 140 keV giving reasonable room-temperature energy resolution. In this work, the room-temperature performance of 3 mm-thick CZT pixel detectors, recently developed at IMEM/CNR of Parma (Italy), is presented. Sub-millimetre detector arrays with pixel pitch less than 500 µm were fabricated. The detectors are characterized by good room-temperature performance even at high bias voltage operation (6000 V cm−1), with energy resolutions (FWHM) of 3% (1.8 keV) and 1.6% (2 keV) at 59.5 keV and 122.1 keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to recovering the charge losses at the inter-pixel gap region. High rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 25 × 106 photons mm−2 s−1. |
| Databáze: | OpenAIRE |
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