Recent advances in the development of high-resolution 3D cadmium zinc telluride drift strip detectors

Elio Angelo Tomarchio, Leonardo Abbene, Fabio Principato, Saverio Altieri, Nicoletta Protti, Silvia Zanettini, Manuele Bettelli, Nicola Sarzi Amade, Stefano Del Sordo, Stefano Del Sordo, Andrea Zappettini, Ezio Caroli, Natalia Auricchio

Risultato della ricerca: Articlepeer review

Abstract

In the last two decades, great efforts have been made in the development of 3D cadmium-zinc-Telluride (CZT) detectors operating at room temperature for gamma-ray spectroscopic imaging. This work presents the spectroscopic performance of new high-resolution CZT drift strip detectors, recently developed at IMEM-CNR of Parma (Italy) in collaboration with due2lab (Italy). The detectors (19.4 mm × 19.4 mm × 6 mm) are organized into collecting anode strips (pitch of 1.6 mm) and drift strips (pitch of 0.4 mm) which are negatively biased to optimize electron charge collection. The cathode is divided into strips orthogonal to the anode strips with a pitch of 2 mm. Dedicated pulse processing analysis was performed on a wide range of collected and induced charge pulse shapes using custom 32-channel digital readout electronics. Excellent room-Temperature energy resolution (1.3% FWHM at 662 keV) was achieved using the detectors without any spectral corrections. Further improvements (0.8% FWHM at 662 keV) were also obtained through a novel correction technique based on the analysis of collected-induced charge pulses from anode and drift strips. These activities are in the framework of two Italian research projects on the development of spectroscopic gamma-ray imagers (10-1000 keV) for astrophysical and medical applications.
Lingua originaleEnglish
pagine (da-a)1564-1576
Numero di pagine13
RivistaJournal of Synchrotron Radiation
Volume27
Stato di pubblicazionePublished - 2020

All Science Journal Classification (ASJC) codes

  • Radiation
  • Nuclear and High Energy Physics
  • Instrumentation

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