Recent achievements of the high resolution Schottky CdTe diode for γ-ray detectors

Takaaki Tanaka*, Yoshihito Kobayashi, Takefumi Mitani, Kazuhiro Nakazawa, Kousuke Oonuki, Goro Sato, Tadayuki Takahashi, Shin Watanabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


We describe the recent progress on the use of Schottky Cadmium telluride (CdTe) diode detectors for γ-ray spectroscopy. The extremely low leakage current of the newly developed CdTe diode allows us to apply a much higher bias voltage in comparison with the previous CdTe detectors. Both the improved charge-collection efficiency and the low leakage current lead to a good energy resolution even at room temperature. Large-area CdTe diode detectors with dimensions of 21.5 × 21.5 mm2 are now available. By stacking 40 layers of these large-area devices, we have achieved a good energy resolution of several keV (FWHM) for MeV γ-rays.

Original languageEnglish
Pages (from-to)309-313
Number of pages5
JournalNew Astronomy Reviews
Issue number1-4
Publication statusPublished - 2004 Feb


  • γ-ray
  • Cadmium telluride (CdTe)
  • CdTe diode detector
  • X-ray

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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