Gamma-Ray Spectrometer for Japanese Lunar polar orbiter

N. Hasebe*, E. Shibamura, T. Atarashiya, T. Doke, L. C. d'Uston, M. Grande, T. Kashiwagi, J. Kikuchi, M. N. Kobayashi, K. Kubo, S. Mitani, K. Mori, K. Narasaki, K. Nomi, T. Takashima, R. Tanibata, R. C. Reedy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (SciVal)


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.

Original languageEnglish
Pages (from-to)1837-1840
Number of pages4
JournalAdvances in Space Research
Issue number11
Publication statusPublished - 1999


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