NDLI: High-resolution CdTe radiation detectors with single-polarity charge sensing technique

Content Provider	IEEE Xplore Digital Library
Author	Tomie, R. Hitomi, K. Shoji, T. Hiratate, Y.
Copyright Year	2002
Description	Author affiliation: Dept. of Electron., Tohoku Univ., Sendai, Japan (Tomie, R.; Hitomi, K.; Shoji, T.; Hiratate, Y.)
Abstract	Cadmium telluride (CdTe) radiation detectors applied three-electrode and pixel structure have been fabricated from commercially available CdTe crystals (2 mm thick). In case of a three-electrode detector, the cathode was 6/spl times/6 mm/sup 2/, the anode was 0.5 mm in diameter and the third electrode surrounding the anode was I mm width. The gap between the third electrode and the anode was 0.25 mm. In case of pixel detectors, the anodes were 9 pixels and the guardring surrounded the pixels. One pixel detector has rectangular 1.35/spl times/1.35 mm/sup 2/ pixels with 1.45 mm pitch and the other pixel detector has rectangular 0.7/spl times/0.7 mm/sup 2/ pixels with 0.8 mm pitch. All electrodes were formed on the crystals by vacuum evaporation of Au. Pulse height spectra of gamma-rays emitted from a /sup 137/Cs source were acquired with the fabricated detectors. The three-electrode detectors were operated with the anode voltage of +10 V, the cathode voltage of -540 V and the third electrode grounded. An energy resolution of 6.0 keV FWHM was recorded for 662 keV gamma-rays at room temperature. The pixel detectors with 1.35/spl times/1.35 mm/sup 2/ pixels and with 0.7/spl times/0.7 mm/sup 2/ pixels have exhibited energy resolutions of 16.7 keV and 12.3 keV FWHM at 662 keV, respectively. The pixel detectors were operated at 600 V and at room temperature. Detailed discussions about the device fabrication, operation and characterization are given in this paper.
Starting Page	2313
Ending Page	2315
File Size	263563
Page Count	3
File Format	PDF
ISBN	0780373243
ISSN	10823654
DOI	10.1109/NSSMIC.2001.1009285
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radiation detectors Anodes Electrodes Crystals Cathodes Voltage Energy resolution Temperature Cadmium compounds Gold
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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