Experimental Evaluation of Material Identification Methods With CdTe X-ray Spectrometric Detector

Abstract

This paper aims to experimentally evaluate a new material multidimensional method for material identification using a new CdTe spectrometric detector. LETI has developed a 16-channel fast read-out system capable of taking spectrometric measurements at count rates of more than 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> counts/s. This read-out system was coupled to CdTe linear array pixel detectors. A multidimensional analysis of the measured spectra has been conducted to perform material identification. The results show a decrease in false detection rate by a factor of up to 2 compared to an optimized dual counting approach applied on the same spectrometric raw data. Compared to a sandwich detector, the false detection rate decreases by a factor of more than 3 for thin objects. As a rule, the paper quantitatively demonstrates the continuous increase in performance and robustness with the number of detector energy counters.