1. Gamma-ray spectrometer for Japanese lunar polar orbiter
- Author
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Eido Shibamura, K. Nomi, Kunishiro Mori, Claude d’Uston, Masanori Kobayashi, Nobuyuki Hasebe, Katsuhiro Narasaki, T. Kashiwagi, Robert C. Reedy, Jun Kikuchi, Tadayoshi Doke, Takeshi Takashima, Manuel Grande, R. Tanibata, T. Atarashiya, S.Mitani S.Mitani, and K.Kubo K.Kubo
- Subjects
Physics ,Atmospheric Science ,Spectrometer ,Detector ,Aerospace Engineering ,Astronomy ,Astronomy and Astrophysics ,Cryocooler ,Scintillator ,law.invention ,Orbiter ,Geophysics ,Impact crater ,Space and Planetary Science ,law ,Shield ,Stirling cycle ,General Earth and Planetary Sciences - Abstract
We review the current status of the development of Gamma-Ray Spectrometer (GRS) for the Lunar mission SELENE. The GRS instrument will measure gamma-rays in the energy range from 100 keV to 9 MeV. The instrument is a high-purity Ge detector surrounded by BGO and plastic scintillators which are operated as an anticoincidence shield, and is cooled by a Stirling cycle cryocooler. The primary objective is to provide global maps of the lunar composition. Measurements are anticipated for Fe, Ti, U, Th, K, Si, Mg, Al, O, Ca and Na over the entire lunar surface. The abundance of water ice in the permanently shaded craters at both the lunar poles will be measured with this instrument.
- Published
- 1999
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