Energy recovery of multiple charge sharing events in room temperature semiconductor pixel detectors

Giuseppe Raso, Fabio Principato, Donato Cascio, Antonino Buttacavoli, Leonardo Abbene, Matthew C. Veale, Paul Seller, Manuele Bettelli, Andrea Zappettini, Marcello Mirabello

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Multiple coincidence events from charge-sharing and fluorescent cross-talk are typical drawbacks in room-temperature semiconductor pixel detectors. The mitigation of these distortions in the measured energy spectra, using charge-sharing discrimination (CSD) and charge-sharing addition (CSA) techniques, is always a trade-off between counting efficiency and energy resolution. The energy recovery of multiple coincidence events is still challenging due to the presence of charge losses after CSA. In this work, we will present original techniques able to correct charge losses after CSA even when multiple pixels are involved. Sub-millimeter cadmium–zinc–telluride (CdZnTe or CZT) pixel detectors were investigated with both uncollimated radiation sources and collimated synchrotron X rays, at energies below and above the K-shell absorption energy of the CZT material. These activities are in the framework of an international collaboration on the development of energy-resolved photon counting (ERPC) systems for spectroscopic X-ray imaging up to 150 keV.
Original languageEnglish
Number of pages13
JournalSensors
Volume21
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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