Jpn. J. Appl. Phys. 49 (2010) 116702 (5 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Development of Double-Sided CdTe Strip Detectors for γ-Ray Imaging and Spectroscopy

Shin-nosuke Ishikawa1,2, Shin Watanabe1,2, Taro Fukuyama1,2, Goro Sato1, Motohide Kokubun1, Hirokazu Odaka1,2, Shinya Saito1,2, Tadayuki Takahashi1,2, Kazuhiro Nakazawa2, and Takaaki Tanaka3

1Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara 252-5210, Japan
2Department of Physics, Graduate School of Science, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
3Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 4305-4060, U.S.A.

(Received July 2, 2010; revised July 24, 2010; accepted July 31, 2010; published online November 22, 2010)

By reading out both anode and cathode strips, double-sided CdTe strip detectors can achieve a large area and a high position resolution with few readout channels, which makes them very attractive for X-ray and γ-ray imaging and spectroscopy. We have developed double-sided CdTe strip detectors, 1.28 ×1.28 cm2 in size and 0.5 and 2.0 mm in thickness. Both electrodes are divided into 32 orthogonal strips with a pitch of 400 µm. For a detector of 0.5 mm thickness, the energy resolution was measured to be 1.5 keV (FWHM) at 60 keV. For the 2.0-mm-thick detector, an energy resolution of 8.0 keV (FWHM) at 662 keV was obtained using only the anode signal. By combining both the anode and cathode signals, we successfully improved the spectral performance and measured an energy resolution of 5.9 keV (FWHM) at 662 keV.

URL: http://jjap.jsap.jp/link?JJAP/49/116702/
DOI: 10.1143/JJAP.49.116702


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