Abstract
Pixellated TlBr detectors have been fabricated from TlBr crystals grown by the traveling molten zone (TMZ) method with zone-refined materials. Charge transport properties of the crystals were measured by performing the Hecht analysis. The TlBr crystals have exhibited the mobility-lifetime product of around 10 -3 cm 2 /V for electrons, which is three times larger than the previously reported value. The pixellated TlBr detectors have thicknesses of ∼2 mm and 4 pixellated electrodes (0.57 mm × 0.57 mm each) on the anode surface. In order to evaluate the spectroscopic performance, the detectors have been tested with 57 Co, 137 Cs and 60 Co gamma-ray sources at room temperature. The TlBr detector 1.9 mm thick has demonstrated energy resolutions of 5.5% (6.7 keV) and 3.4% (22.3 keV) for 122 and 662 keV gamma-rays, respectively. Full-energy peaks of 1.17 and 1.33 MeV gamma-rays from the 60 Co source have also been detected with the detector.
| Original language | English |
|---|---|
| Pages (from-to) | 4448-4450 |
| Number of pages | 3 |
| Journal | IEEE Nuclear Science Symposium Conference Record |
| Volume | 7 |
| Publication status | Published - 2004 Dec 1 |
| Event | 2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy Duration: 2004 Oct 16 → 2004 Oct 22 |
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging