| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1830841 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2007 | 5 Pages |
We have studied the spectroscopic performance and charge transport properties of planar detectors fabricated from single crystal Cd1−xZnx Te (x=0.1x=0.1) grown using the modified vertical Bridgman technique. For the measurement of medium energy X-rays (10–50 keV), an energy resolution of 3 keV (FWHM) was observed; however performance was seen to degrade at temperatures below 260 K. The charge transport properties of electrons were studied as a function of temperature using 241Am 5.5 MeV α-particles. At room temperature, the measured electron mobility-lifetime product (μτ) was 1.25±0.02×10−3 cm2 V−1, which decreased with cooling. Evidence was found for the creation of an internal polarization field at lower temperatures consistent with the presence of deep levels with a relatively high concentration and/or capture cross-section. An analysis of the temperature dependent electron drift mobility also indicates the presence of shallow electron traps at EA∼0.2 eV.
