Search results for "CZT pixel detectors"

showing 2 items of 2 documents

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

2021

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 we…

Physics::Instrumentation and DetectorsCZT pixel detectors030303 biophysicsTP1-1185Radiation01 natural sciencesBiochemistryCoincidenceCollimated lightArticleAnalytical ChemistryCharge sharingcharge-sharing correction03 medical and health sciencesOptics0103 physical sciencesElectrical and Electronic EngineeringInstrumentationPhysics0303 health sciencesCharge sharing; Charge-sharing correction; CZT pixel detectors; Semiconductor pixel detectorscharge sharingPixel010308 nuclear & particles physicsbusiness.industryChemical technologyCounting efficiencyDetectorsemiconductor pixel detectorsSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Atomic and Molecular Physics and OpticsPhoton countingbusinessSensors
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Charge loss correction in CZT pixel detectors at low and high fluxes: analysis of positive and negative pulses

2018

Charge losses are typical drawbacks in cadmium–zinc–telluride (CZT) pixel detectors. The effects of these phenomena are strongly related to the interaction point of the photons and are more severe for photon interactions at the inter-pixel gap and near the pixelated anode. In this work, we present some original techniques able to correct charge losses in pixelated CZT detectors at both low and high fluxes. The height, the shape and the arrival time of collected- and induced-charge pulses with both positive and negative polarities are analysed to recover charge losses after the application of charge sharing addition (CSA). Sub-millimetre CZT pixel detectors, fabricated by different manufactu…

Settore FIS/01 - Fisica SperimentaleCZT pixel detectors Charge sharing Charge losses Charge loss correction negative induced-charge pulsesSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)
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