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

Nobuyuki Hasebe, Eido Shibamura, Takashi Miyachi, Takeshi Takashima, Masanori Kobayashi, Osamu Okudaira, Naoyuki Yamashita, Shingo Kobayashi, Takeshi Ishizaki, Kunitomo Sakurai, Mitsuhiro Miyajima, Masayuki Fujii, Keisuke Narasaki, Shigeki Takai, Katsuhiro Tsurumi, Hiroshi Kaneko, Michio Nakazawa, Kunishiro Mori, Olivier Gasnault, Sylvestre Maurice & 3 others Claude d'Ustona, Robert C. Reedy, Manuel Grande

    Research output: Contribution to journalArticle

    37 Citations (Scopus)

    Abstract

    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 Stifling cryocooler with its compressor attached to a passive radiator facing the cold space. The cooling system maintains the Ge detector below 90 K during the observation. The flight model of the GRS has achieved an energy resolution of 3.0 keV (FWHM) at 1333 keV. Energy spectra obtained by the GRS will show sharp gamma-ray lines whose energies identify the elements and whose intensities determine the concentrations of the elements, permitting global mapping of the elemental abundances in the sub-surface of the Moon. The elemental maps obtained by the GRS with such high-energy resolution enable us to study lunar geoscience problems.

    Original languageEnglish
    Pages (from-to)299-312
    Number of pages14
    JournalEarth, Planets and Space
    Volume60
    Issue number4
    Publication statusPublished - 2008

    Fingerprint

    gamma ray spectrometers
    spectrometer
    germanium
    energy
    detectors
    anticoincidence detectors
    gamma rays
    crystal
    lunar surface
    bismuth
    cooling systems
    radiators
    compressors
    moon
    scintillation counters
    crystals
    Moon
    energy spectra
    plastics
    plastic

    Keywords

    • Chemical composition
    • Gamma-ray spectroscopy
    • GRS
    • Lunar forman and evolution
    • Moon
    • SELENE (KAGUYA)

    ASJC Scopus subject areas

    • Earth and Planetary Sciences (miscellaneous)
    • Geology
    • Space and Planetary Science

    Cite this

    Hasebe, N., Shibamura, E., Miyachi, T., Takashima, T., Kobayashi, M., Okudaira, O., ... Grande, M. (2008). Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE. Earth, Planets and Space, 60(4), 299-312.

    Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE. / Hasebe, Nobuyuki; Shibamura, Eido; Miyachi, Takashi; Takashima, Takeshi; Kobayashi, Masanori; Okudaira, Osamu; Yamashita, Naoyuki; Kobayashi, Shingo; Ishizaki, Takeshi; Sakurai, Kunitomo; Miyajima, Mitsuhiro; Fujii, Masayuki; Narasaki, Keisuke; Takai, Shigeki; Tsurumi, Katsuhiro; Kaneko, Hiroshi; Nakazawa, Michio; Mori, Kunishiro; Gasnault, Olivier; Maurice, Sylvestre; d'Ustona, Claude; Reedy, Robert C.; Grande, Manuel.

    In: Earth, Planets and Space, Vol. 60, No. 4, 2008, p. 299-312.

    Research output: Contribution to journalArticle

    Hasebe, N, Shibamura, E, Miyachi, T, Takashima, T, Kobayashi, M, Okudaira, O, Yamashita, N, Kobayashi, S, Ishizaki, T, Sakurai, K, Miyajima, M, Fujii, M, Narasaki, K, Takai, S, Tsurumi, K, Kaneko, H, Nakazawa, M, Mori, K, Gasnault, O, Maurice, S, d'Ustona, C, Reedy, RC & Grande, M 2008, 'Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE', Earth, Planets and Space, vol. 60, no. 4, pp. 299-312.
    Hasebe N, Shibamura E, Miyachi T, Takashima T, Kobayashi M, Okudaira O et al. Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE. Earth, Planets and Space. 2008;60(4):299-312.
    Hasebe, Nobuyuki ; Shibamura, Eido ; Miyachi, Takashi ; Takashima, Takeshi ; Kobayashi, Masanori ; Okudaira, Osamu ; Yamashita, Naoyuki ; Kobayashi, Shingo ; Ishizaki, Takeshi ; Sakurai, Kunitomo ; Miyajima, Mitsuhiro ; Fujii, Masayuki ; Narasaki, Keisuke ; Takai, Shigeki ; Tsurumi, Katsuhiro ; Kaneko, Hiroshi ; Nakazawa, Michio ; Mori, Kunishiro ; Gasnault, Olivier ; Maurice, Sylvestre ; d'Ustona, Claude ; Reedy, Robert C. ; Grande, Manuel. / Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE. In: Earth, Planets and Space. 2008 ; Vol. 60, No. 4. pp. 299-312.
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    AU - Kaneko, Hiroshi

    AU - Nakazawa, Michio

    AU - Mori, Kunishiro

    AU - Gasnault, Olivier

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