GammaTracker is a handheld radioisotope identification device in development at Pacific Northwest National Laboratory that uses eighteen pixelated Cadmium-Zinc Telluride (CZT) crystals to provide energy resolution approaching that of high-purity germanium without the need for cryogenic cooling. Additionally, these crystals can be used to provide directional and imaging capabilities that cannot be found in other handheld detectors. A significant number of CZT crystals have been procured during the development of the GammaTracker system; the majority of these were procured with the same set of specifications. Each of these detectors has been characterized in terms of key parameters, including current-voltage response and pixel-by-pixel energy resolution. The results of this testing indicate that the overall quality of CZT crystals is improving over time.
Revised: July 24, 2014 |
Published: August 21, 2011
Citation
Becker E.M., C.E. Seifert, M.J. Myjak, L.E. Erikson, S.J. Morris, D.R. Balvage, and R.P. Lundy. 2011.Performance Characteristics of Pixelated CZT Crystals used on the GammaTracker Project. In Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, August 21, 2011, San Diego, California. Proceedings of the SPIE, edited by LA Franks, RB James and A Burger, 8142, Paper No. 81420F. Bellingham, Washington:SPIE.PNNL-SA-81913.doi:10.1117/12.894114