Application of CdTe for the NeXT mission

Tadayuki Takahashi*, Kazuhiro Nakazawa, Shin Watanabe, Goro Sato, Takefumi Mitani, Takaaki Tanaka, Kousuke Oonuki, Ken'Ichi Tamura, Hiroyasu Tajima, Tuneyoshi Kamae, Greg Madejski, Masaharu Nomachi, Yasushi Fukazawa, Kazuo Makishima, Motohide Kokubun, Yukikatsu Terada, Jun Kataoka, Makoto Tashiro


研究成果: Conference article査読

37 被引用数 (Scopus)


Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) have been regarded as promising semiconductor materials for hard X-ray and γ-ray detection. The high-atomic number of the materials (ZCd=48,ZTe=52) gives a high quantum efficiency in comparison with Si. The large band-gap energy (Eg=1.5eV) allows to operate the detector at room temperature. Based on recent achievements in high-resolution CdTe detectors, in the technology of ASICs and in bump-bonding, we have proposed the novel hard X-ray and γ-ray detectors for the NeXT mission in Japan. The high-energy response of the super mirror onboard NeXT will enable us to perform the first sensitive imaging observations up to 80 keV. The focal plane detector, which combines a fully depleted X-ray CCD and a pixellated CdTe detector, will provide spectra and images in the wide energy range from 0.5 to 80 keV. In the soft γ-ray band up to ∼1MeV, a narrow field-of-view Compton γ-ray telescope utilizing several tens of layers of thin Si or CdTe detector will provide precise spectra with much higher sensitivity than present instruments. The continuum sensitivity will reach several ×10-8photons-1keV-1cm-2 in the hard X-ray region and a few ×10-7photons-1keV-1cm-2 in the soft γ-ray region.

ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
出版ステータスPublished - 2005 4 1
イベントDevelopment and Application of semiconductor Tracking Detectors -
継続期間: 2004 6 142004 6 17

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学


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