Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8210118 | Applied Radiation and Isotopes | 2014 | 5 Pages |
Abstract
Coplanar grid (CPG) CdZnTe detectors have been used as gamma-ray spectrometers for years. Comparing with pixelated CdZnTe detectors, CPG CdZnTe detectors have either no or poor spatial resolution, which directly limits its use in imaging applications. To address the issue, a 2Ã2 CPG array CdZnTe detector with dimensions of 7Ã7Ã5Â mm3 was fabricated. Each of the CPG pairs in the detector was moderately shrunk in size and precisely designed to improve the spatial resolution while maintaining good energy resolution, considering the charge loss at the surface between the strips of each CPG pairs. Preliminary measurements were demonstrated at an energy resolution of 2.7-3.9% for the four CPG pairs using 662Â keV gamma rays and with a spatial resolution of 3.3Â mm, which is the best spatial resolution ever achieved for CPG CdZnTe detectors. The results reveal that the CPG CdZnTe detector can also be applied to imaging applications at a substantially higher spatial resolution.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Yuedong Ma, Shali Xiao, Guoqiang Yang, Liuqiang Zhang,