Criteria selection for 20×20×15 mm³ pixelated CdZnTe semiconductor detectors

摘要

Large volume, pixelated Cadmium Zinc Telluride detectors have been developed over the past decade. In November of 2009, Redlen Technologies began manufacturing 130 20×20×15 mm³ CdZnTe detectors, each with a common grid between the 121 pixels, for the Polaris Project. Results for the first 65 detectors were studied to determine a set of criteria that could be used to help streamline the detector testing procedure for large volume CdZnTe detectors. By rejecting detectors with >5% uncorrected FWHM, >2 nA/V of total grid-to-anode leakage current, and excessive anode noise detectors with over 1.2% corrected single pixel FWHM at 662 keV were correctly identified 88% of the time. Those with under 1.2% corrected single pixel FWHM at 662 keV were correctly identified 80% of the time.