Cadmium zinc telluride (CZT) semiconductor detectors can be used as medium-resolution gamma-ray spectrometers, with the main advantage of a high portability and operation at room temperature. Their characteristics in terms of detection efficiency and resolution fall between the performance of sodium iodide and germanium detectors. One of the disadvantages of a CZT detector is the presence of a pronounced low-energy tail in the peak shape that complicates the analysis of spectra with overlapping peaks. The range of applications of CZT detectors includes verification measurements of fresh and irradiated nuclear material for safeguarding nuclear materials. In this chapter nuclear safeguards applications using CZT detectors are reviewed. We discuss the verification of uranium isotopic abundances by both the enrichment meter principle and methods relying on a multi-peak spectrum analysis and also discuss applications at the back end of the fuel cycle. The latter include the characterization of spent nuclear fuel assemblies and spent fuel pin counting by means of passive gamma-ray emission tomography.
|Title of host publication
|Advanced materials for radiation detection
|Krzysztof (Kris) Iniewski
|Number of pages
|Published - 6 Aug 2021