Title :
Improvement of the CdTe diode detectors
Author :
Nakazawa, Kazuhiro ; Oonuki, Kousuke ; Tanaka, Takaaki ; Kobayashi, Yoshihito ; Tamura, Ken´ichi ; Mitani, Takefumi ; Sato, Goro ; Watanabe, Shin ; Takahashi, Tadayuki ; Ohno, Ryoichi ; Kitajima, Akihito ; Kuroda, Yoshikatsu ; Onishi, Mitsunobu
Author_Institution :
Inst. of Space & Astron. Sci., Kanagawa, Japan
Abstract :
Recent results from the CdTe Schottky diode detectors employing a guard-ring electrode are reported. Cathode electrode, made of Pt, was separated into an active electrode(s) and a surrounding guard-ring. Typical leakage current of a device with an active area of 2 × 2 mm2 and 0.5 mm thickness surrounded by a guard-ring, is 7 pA and 20 pA at a bias of 100 V and 500 V, respectively, operated at 20 °C . Spectral resolution of this device is 0.93 keV and 1.2 keV (FWHM) at 59.5 keV and 122 keV, respectively, operated at 20 °C with a bias of 800 V. Detailed study of the characteristics of these devices working as a gamma-ray detector is presented.
Keywords :
Schottky diodes; cathodes; gamma-ray detection; leakage currents; semiconductor counters; 0.5 mm; 0.93 keV; 1.2 keV; 100 V; 122 keV; 2 mm; 20 degC; 20 pA; 500 V; 59.5 keV; 7 pA; 800 V; CdTe Schottky diode detectors; Pt cathode electrode; active electrode; gamma-ray detector; guard-ring electrode; leakage current; spectral resolution; Cadmium compounds; Cathodes; Electrodes; Envelope detectors; Gamma ray detection; Gamma ray detectors; Leakage current; Schottky diodes; Tail; Temperature;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2003 IEEE
Print_ISBN :
0-7803-8257-9
DOI :
10.1109/NSSMIC.2003.1352684
