In this work, the spectroscopic performances of new cadmium-zinc-Telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500μm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-Temperature performance characterizes the detectors even at high-bias-voltage operation (9000Vcm-1), with energy resolutions (FWHM) of 4% (0.9keV), 1.7% (1keV) and 1.3% (1.6keV) at 22.1, 59.5 and 122.1keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106photonsmm-2s-1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.

Abbene L., Principato F., Gerardi G., Buttacavoli A., Cascio D., Bettelli M., et al. (2020). Room-Temperature X-ray response of cadmium-zinc-Telluride pixel detectors grown by the vertical Bridgman technique. JOURNAL OF SYNCHROTRON RADIATION, 27(2), 319-328 [10.1107/S1600577519015996].

Room-Temperature X-ray response of cadmium-zinc-Telluride pixel detectors grown by the vertical Bridgman technique

Abbene L.
;
Principato F.;Gerardi G.;Buttacavoli A.;Cascio D.;Tomarchio E.;
2020-01-01

Abstract

In this work, the spectroscopic performances of new cadmium-zinc-Telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500μm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-Temperature performance characterizes the detectors even at high-bias-voltage operation (9000Vcm-1), with energy resolutions (FWHM) of 4% (0.9keV), 1.7% (1keV) and 1.3% (1.6keV) at 22.1, 59.5 and 122.1keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106photonsmm-2s-1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore FIS/01 - Fisica Sperimentale
Abbene L., Principato F., Gerardi G., Buttacavoli A., Cascio D., Bettelli M., et al. (2020). Room-Temperature X-ray response of cadmium-zinc-Telluride pixel detectors grown by the vertical Bridgman technique. JOURNAL OF SYNCHROTRON RADIATION, 27(2), 319-328 [10.1107/S1600577519015996].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/404391
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