Title
Energy Recovery Of Multiple Charge Sharing Events In Room Temperature Semiconductor Pixel Detectors
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.
Year
DOI
Venue
2021
10.3390/s21113669
SENSORS
Keywords
DocType
Volume
CZT pixel detectors, charge sharing, charge-sharing correction, semiconductor pixel detectors
Journal
21
Issue
ISSN
Citations 
11
1424-8220
1
PageRank 
References 
Authors
0.38
0
11