Abstract
Two methods are presented for obtaining excellent spectroscopic performance and good photo-peak efficiencies for CdZnTe coarsely segmented pad and strip detectors. The 'correlation method' utilizes the correlation between the signals in the planar and segmented electrodes. This correlation provides an indication of the point of interaction. Application of a correction which is based on this correlation generates spectra with a resolution of 1.4% FWHM at 356 keV for pad detectors. Furthermore, for strip detectors this method yields improved spectra and an increase of more than 35% in photo-peak efficiencies at 140.5 keV. The 'compensation method' involves tuning the degree of electron trapping to compensate for the almost completely trapped holes. Contrary to planar detectors, for segmented detectors the compensation condition yields induced charge signals which are 80% of the maximum signal. Using this method we obtained a spectrum with energy resolution of 3.5% FWHM at 122 keV and a peak-to-valley ratio of approximately 100:1.
| Original language | English |
|---|---|
| Pages (from-to) | 59-70 |
| Number of pages | 12 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3769 |
| State | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1999 Penetrating Radiation Systems and Applications - Denver, CO, USA Duration: 19 Jul 1999 → 23 Jul 1999 |