Room-Temperature X-ray response of cadmium-zinc-Telluride pixel detectors grown by the vertical Bridgman technique

Donato Cascio, Elio Angelo Tomarchio, Leonardo Abbene, Fabio Principato, Gaetano Gerardi, Antonino Buttacavoli, Matthew C. Veale, Oliver Fox, Kawal Sawhney, Silvia Zanettini, Paul Seller, Manuele Bettelli, Nicola Sarzi Amade, Andrea Zappettini

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this work, the spectroscopic performances of new cadmium-zinc-Telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500μm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-Temperature performance characterizes the detectors even at high-bias-voltage operation (9000Vcm-1), with energy resolutions (FWHM) of 4% (0.9keV), 1.7% (1keV) and 1.3% (1.6keV) at 22.1, 59.5 and 122.1keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106photonsmm-2s-1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.
Original languageEnglish
Pages (from-to)319-328
Number of pages10
JournalJournal of Synchrotron Radiation
Volume27
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Radiation
  • Nuclear and High Energy Physics
  • Instrumentation

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