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Instruments / Technical Area	Publication Details	Published	Actions
B16-Test Beamline	Incomplete charge collection at inter-pixel gap in low- and high-flux cadmium zinc telluride pixel detectors Antonino Buttacavoli , Fabio Principato , Gaetano Gerardi , Donato Cascio , Giuseppe Raso , Manuele Bettelli , Andrea Zappettini , Paul Seller , Matthew Veale , Leonardo Abbene Sensors 22 DOI: 10.3390/s22041441 Diamond Proposal Number(s): [20545] Open Access Show Abstract ▼ Abstract: The success of cadmium zinc telluride (CZT) detectors in room-temperature spectroscopic X-ray imaging is now widely accepted. The most common CZT detectors are characterized by enhanced-charge transport properties of electrons, with mobility-lifetime products μeτe > 10−2 cm2/V and μhτh > 10−5 cm2/V. These materials, typically termed low-flux LF-CZT, are successfully used for thick electron-sensing detectors and in low-flux conditions. Recently, new CZT materials with hole mobility-lifetime product enhancements (μhτh > 10−4 cm2/V and μeτe > 10−3 cm2/V) have been fabricated for high-flux measurements (high-flux HF-CZT detectors). In this work, we will present the performance and charge-sharing properties of sub-millimeter CZT pixel detectors based on LF-CZT and HF-CZT crystals. Experimental results from the measurement of energy spectra after charge-sharing addition (CSA) and from 2D X-ray mapping highlight the better charge-collection properties of HF-CZT detectors near the inter-pixel gaps. The successful mitigation of the effects of incomplete charge collection after CSA was also performed through original charge-sharing correction techniques. These activities exist in the framework of international collaboration on the development of energy-resolved X-ray scanners for medical applications and non-destructive testing in the food industry.	Feb 2022

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B16-Test Beamline

Incomplete charge collection at inter-pixel gap in low- and high-flux cadmium zinc telluride pixel detectors

Antonino Buttacavoli , Fabio Principato , Gaetano Gerardi , Donato Cascio , Giuseppe Raso , Manuele Bettelli , Andrea Zappettini , Paul Seller , Matthew Veale , Leonardo Abbene

Sensors 22

DOI: 10.3390/s22041441

Diamond Proposal Number(s): [20545]