Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE

@article{Hasebe2008GammarayS,
  title={Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE},
  author={Nobuyuki Hasebe and Eido Shibamura and Takashi Miyachi and Takeshi Takashima and Masanori Kobayashi and Osamu Okudaira and Naoyuki Yamashita and Shingo Kobayashi and Takeshi Ishizaki and Kunitomo Sakurai and Mitsuhiro Miyajima and Masayuki Fujii and Keisuke Narasaki and Shigeki Takai and Katsuhiro Tsurumi and Hiroshi Kaneko and Michio Nakazawa and Kunishiro Mori and Olivier Gasnault and Sylvestre Maurice and C. d'Uston and R. C. Reedy and Manuel Grande},
  journal={Earth, Planets and Space},
  year={2008},
  volume={60},
  pages={299-312}
}
The high-precision gamma-ray spectrometer (GRS) on the lunar polar orbiter SELENE is designed to measure 200 keV—12 MeV gamma rays in order to determine elemental compositions of the lunar surface. The GRS consists of a large germanium (Ge) crystal as a main detector and a massive bismuth germanate crystal and a plastic scintillator as anticoincidence detectors. The Ge detector is cooled by a Stirling cryocooler with its compressor attached to a passive radiator facing the cold space. The… 
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