Improved resolution for 3-D position sensitive CdZnTe spectrometers
| Autor: | Dan Xu, Zhong He, J.E. Berry, David K. Wehe, Glenn F. Knoll, Feng Zhang |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
Nuclear and High Energy Physics Pixel Spectrometer business.industry Detector Resolution (electron density) Full width at half maximum Optics Nuclear Energy and Engineering Nuclear electronics Calibration Electronic engineering Gamma spectroscopy Electrical and Electronic Engineering business |
| Zdroj: | IEEE Transactions on Nuclear Science. 51:2427-2431 |
| ISSN: | 0018-9499 |
| DOI: | 10.1109/tns.2004.835635 |
| Popis: | Two three-dimensional position sensitive CdZnTe gamma-ray spectrometers based on VAS2/TAT2 ASICs were constructed and fully tested. Each 1.5/spl times/1.5/spl times/1 cm/sup 3/ CdZnTe detector employs 11/spl times/11 pixelated anodes. Each pixel location provides the interaction's lateral coordinates, while the cathode/anode signal ratio and the electron drift time are both used to obtain the interaction depth. Data-acquisition and processing software were developed to perform calibration and real-time spectroscopy. An energy resolution of 1.11% full-width at half-maximum (FWHM) at 662 keV was obtained for single-pixel events from the 120 working pixels of one detector, and an energy resolution of 1.14% FWHM was obtained on the other detector. Significant progress in improving energy resolution for multiple pixel events has been realized. The energy resolutions at 662 keV for two-pixel events and three-pixel events were 1.57% FWHM and 2.13% FWHM, respectively. |
| Databáze: | OpenAIRE |
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