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Sensors
Volume 21
Issue 11
10.3390/s21113669
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Article

Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors

by
Antonino Buttacavoli
1,
Gaetano Gerardi
1,
Fabio Principato
1,
Marcello Mirabello
1,
Donato Cascio
1,
Giuseppe Raso
1,
Manuele Bettelli
2,
Andrea Zappettini
2,
Paul Seller
3,
Matthew C. Veale
3 and
Leonardo Abbene
1,*
1
Department of Physics and Chemistry (DiFC)-Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy
2
IMEM/CNR, Parco Area delle Scienze 37/A, 43100 Parma, Italy
3
Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton OX11 0QX, UK
*
Author to whom correspondence should be addressed.
Sensors 2021, 21(11), 3669; https://doi.org/10.3390/s21113669
Submission received: 31 March 2021 / Revised: 3 May 2021 / Accepted: 23 May 2021 / Published: 25 May 2021
(This article belongs to the Special Issue Room Temperature Semiconductor Detectors: Development and Applications)
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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.
Keywords: CZT pixel detectors; charge sharing; charge-sharing correction; semiconductor pixel detectors CZT pixel detectors; charge sharing; charge-sharing correction; semiconductor pixel detectors

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MDPI and ACS Style

Buttacavoli, A.; Gerardi, G.; Principato, F.; Mirabello, M.; Cascio, D.; Raso, G.; Bettelli, M.; Zappettini, A.; Seller, P.; Veale, M.C.; et al. Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors. Sensors 2021, 21, 3669. https://doi.org/10.3390/s21113669

AMA Style

Buttacavoli A, Gerardi G, Principato F, Mirabello M, Cascio D, Raso G, Bettelli M, Zappettini A, Seller P, Veale MC, et al. Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors. Sensors. 2021; 21(11):3669. https://doi.org/10.3390/s21113669

Chicago/Turabian Style

Buttacavoli, Antonino, Gaetano Gerardi, Fabio Principato, Marcello Mirabello, Donato Cascio, Giuseppe Raso, Manuele Bettelli, Andrea Zappettini, Paul Seller, Matthew C. Veale, and et al. 2021. "Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors" Sensors 21, no. 11: 3669. https://doi.org/10.3390/s21113669

APA Style

Buttacavoli, A., Gerardi, G., Principato, F., Mirabello, M., Cascio, D., Raso, G., Bettelli, M., Zappettini, A., Seller, P., Veale, M. C., & Abbene, L. (2021). Energy Recovery of Multiple Charge Sharing Events in Room Temperature Semiconductor Pixel Detectors. Sensors, 21(11), 3669. https://doi.org/10.3390/s21113669

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