Referenced Items are not available for this document.
Two 2.25-cm3 CdZnTe gamma-ray spectrometers with three-dimensional (3-D) position sensitivity were constructed and tested. By using 11 × 11 pixellated anodes and depth-sensing techniques, individual spectral data for each of ∼4800 voxels were collected throughout the detector volume. Energy resolution of 1.11% and 1.14% FWHM at 662 keV were obtained for single-pixel events from these two detectors, respectively. Spatial variations of electron mobility-lifetime product, energy resolution, photopeak efficiency, and total efficiency have been observed and analyzed. This analysis provides a direct observation on the uniformity of detector response (due to material, weighting potential, and electric field distribution) in 3-D. Possible defects in the detector are identified. The impact of the spatial variation of detector response on a CZT gamma-ray spectrometer is discussed.
Published in:
Nuclear Science, IEEE Transactions on
(Volume:51
,
Issue:
6
)
Date of Publication: Dec. 2004
- Page(s):
- 3098 - 3104
- ISSN :
- 0018-9499
- INSPEC Accession Number:
- 8237341
- Digital Object Identifier :
- 10.1109/TNS.2004.839078
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 20 December 2004
- Issue Date :
- Dec. 2004
- Sponsored by :
- IEEE Nuclear and Plasma Sciences Society
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