Performance of a cooled CdZnTe X-ray detector

Author

Niemelä, A. ; Sipilä, H.

Author_Institution

Metorex Int. Oy, Espoo, Finland

Volume

1

fYear

1994

fDate

30 Oct-5 Nov 1994

Firstpage

139

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 Cd_0.9Zn_0.1Te 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; Cd_0.9Zn_0.1Te; 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record

Conference_Location

Norfolk, VA

Print_ISBN

0-7803-2544-3

Type

conf

DOI

10.1109/NSSMIC.1994.474373

Filename

474373