Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors
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) techniqu...
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doaj-cb82d9f4193b4d55b3964fd976cd5fc02021-06-01T01:03:04ZengMDPI AGSensors1424-82202021-05-01213669366910.3390/s21113669Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel DetectorsAntonino Buttacavoli0Gaetano Gerardi1Fabio Principato2Marcello Mirabello3Donato Cascio4Giuseppe Raso5Manuele Bettelli6Andrea Zappettini7Paul Seller8Matthew C. Veale9Leonardo Abbene10Department of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyDepartment of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyDepartment of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyDepartment of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyDepartment of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyDepartment of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyIMEM/CNR, Parco Area delle Scienze 37/A, 43100 Parma, ItalyIMEM/CNR, Parco Area delle Scienze 37/A, 43100 Parma, ItalyScience and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton OX11 0QX, UKScience and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton OX11 0QX, UKDepartment of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, ItalyMultiple 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.https://www.mdpi.com/1424-8220/21/11/3669CZT pixel detectorscharge sharingcharge-sharing correctionsemiconductor pixel detectors |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Antonino Buttacavoli Gaetano Gerardi Fabio Principato Marcello Mirabello Donato Cascio Giuseppe Raso Manuele Bettelli Andrea Zappettini Paul Seller Matthew C. Veale Leonardo Abbene |
spellingShingle |
Antonino Buttacavoli Gaetano Gerardi Fabio Principato Marcello Mirabello Donato Cascio Giuseppe Raso Manuele Bettelli Andrea Zappettini Paul Seller Matthew C. Veale Leonardo Abbene Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors Sensors CZT pixel detectors charge sharing charge-sharing correction semiconductor pixel detectors |
author_facet |
Antonino Buttacavoli Gaetano Gerardi Fabio Principato Marcello Mirabello Donato Cascio Giuseppe Raso Manuele Bettelli Andrea Zappettini Paul Seller Matthew C. Veale Leonardo Abbene |
author_sort |
Antonino Buttacavoli |
title |
Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors |
title_short |
Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors |
title_full |
Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors |
title_fullStr |
Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors |
title_full_unstemmed |
Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors |
title_sort |
energy recovery of multiple charge sharing events in room temperature semiconductor pixel detectors |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2021-05-01 |
description |
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. |
topic |
CZT pixel detectors charge sharing charge-sharing correction semiconductor pixel detectors |
url |
https://www.mdpi.com/1424-8220/21/11/3669 |
work_keys_str_mv |
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1721413236991983616 |