| Autor: |
Zhong He, Glenn F. Knoll, W. Li, Carl Michael Stahle, David K. Wehe, J.E. Berry |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 422:173-178 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/s0168-9002(98)00950-4 |
| Popis: |
Two 3-D position-sensitive room temperature semiconductor γ-ray spectrometers have been built using 1 cm 3 cubic CdZnTe crystals. The lateral coordinates of γ-ray interaction are obtained from the location of the 11( x )×11( y ) pixellated anodes and the depth ( z ) is obtained from the ratio of the signals coming from the cathode and the anode. Energy spectra from 662 keV incident γ-rays have been collected from each of the 11 (x)×11 (y)×20 (z) voxels in both of the CdZnTe devices. After corrections for electron trapping, the difference of weighting potentials in 3-D, and for the gain variation of the readout circuitry, energy resolutions of 1.70% (11.3 keV) FWHM and 1.84% (12.2 keV) FWHM were obtained at 662 keV γ-ray energy on the first and second detectors, respectively, from the whole bulk for single-pixel events. Possible improvements in the detector performance are discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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