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Window-Based Energy Selecting X-ray Imaging and Charge Sharing in Cadmium Zinc Telluride Linear Array Detectors for Contaminant Detection

  • Autori: Buttacavoli A.; Principato F.; Gerardi G.; Cascio D.; Raso G.; Bettelli M.; Zappettini A.; Taormina V.; Abbene L.
  • Anno di pubblicazione: 2023
  • Tipologia: Articolo in rivista
  • Parole Chiave: charge sharing; contaminant detection; CZT detectors; energy-resolved X-ray imaging; semiconductor pixel detectors; X-ray detectors
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The spectroscopic and imaging performance of energy-resolved photon counting detectors, based on new sub-millimetre boron oxide encapsulated vertical Bridgman cadmium zinc telluride linear arrays, are presented in this work. The activities are in the framework of the AVATAR X project, planning the development of X-ray scanners for contaminant detection in food industry. The detectors, characterized by high spatial (250 µm) and energy (<3 keV) resolution, allow spectral X-ray imaging with interesting image quality improvements. The effects of charge sharing and energy-resolved techniques on contrast-to-noise ratio (CNR) enhancements are investigated. The benefits of a new energy-resolved X-ray imaging approach, termed window-based energy selecting, in the detection of low- and high-density contaminants are also shown.