Title :
Performance of a cooled CdZnTe X-ray detector
Author :
Niemelä, A. ; Sipilä, H.
Author_Institution :
Metorex Int. Oy, Espoo, Finland
fDate :
30 Oct-5 Nov 1994
Abstract :
We have studied several high-resistivity, room-temperature CdZnTe detectors at temperatures ranging from -20°C to -38°C. Cooling the detector down reduces the leakage current, which enables the use of low-noise pulsed-optical feedback preamplifiers and higher bias voltages. These factors improve the detector performance significantly; better energy resolution, charge collection and peak-to-background ratio are achieved. Running a 16-mm2 Cd0.9Zn0.1 Te detector crystal at -28°C, we have obtained energy resolutions of 292 eV at the 5.9-keV line of 55Fe, and of 0.90 keV at the 59.6-keV line of 241Am
Keywords :
II-VI semiconductors; X-ray detection; cadmium compounds; semiconductor counters; zinc compounds; -28 C; 292 eV; Cd0.9Zn0.1Te; charge collection; cooled CdZnTe X-ray detector; energy resolution; energy resolutions; higher bias voltages; leakage current; low-noise pulsed-optical feedback preamplifiers; peak-to-background ratio; Cooling; Energy resolution; Feedback; Leak detection; Leakage current; Preamplifiers; Temperature distribution; Voltage; X-ray detectors; Zinc;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474373
