TY - JOUR
T1 - Room-Temperature X-ray response of cadmium-zinc-Telluride pixel detectors grown by the vertical Bridgman technique
AU - Abbene, Leonardo
AU - Buttacavoli, Antonino
AU - Tomarchio, Elio Angelo
AU - Gerardi, Gaetano
AU - Cascio, Donato
AU - Principato, Fabio
AU - Veale, Matthew C.
AU - Fox, Oliver
AU - Sawhney, Kawal
AU - Zanettini, Silvia
AU - Seller, Paul
AU - Bettelli, Manuele
AU - Amade, Nicola Sarzi
AU - Zappettini, Andrea
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - CdZnTe pixel detectors
KW - X-ray and gamma-ray detectors
KW - charge losses
KW - charge sharing
KW - spectroscopic X-ray imaging
KW - vertical Bridgman technique
KW - CdZnTe pixel detectors
KW - X-ray and gamma-ray detectors
KW - charge losses
KW - charge sharing
KW - spectroscopic X-ray imaging
KW - vertical Bridgman technique
UR - http://hdl.handle.net/10447/404391
M3 - Article
VL - 27
SP - 319
EP - 328
JO - Journal of Synchrotron Radiation
JF - Journal of Synchrotron Radiation
SN - 0909-0495
ER -