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

N. Hasebe; E. Shibamura; T. Miyachil; T. Takashima; M. Kobayashi; O. O  Okudaira; S. N  Yamashita; T. Kobayashi; K. Ishizaki; M. Sakurai; M. Miyajima; K. Fujii; S. Narasaki; K. Takai; H. Tsurumi; M. Kaneko; K. Nakazawa; O. Mori; S. Gasnault; C. Maurice; M. Grande

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

N. Hasebe, E. Shibamura, T. Miyachil, T. Takashima, M. Kobayashi, O. O Okudaira, S. N Yamashita, T. Kobayashi, K. Ishizaki, M. Sakurai, M. Miyajima, K. Fujii, S. Narasaki, K. Takai, H. Tsurumi, M. Kaneko, K. Nakazawa, O. Mori, S. Gasnault, C. MauriceM. Grande

Department of Physics

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47 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 Stirling 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. Key words: Moon, gamma-ray spectroscopy, chemical composition, lunar formation and evolution, SELENE (KAGUYA), GRS.

Original language	English
Pages (from-to)	299-312
Number of pages	14
Journal	Earth, Planets and Space
Volume	60
Issue number	4
Publication status	Published - 09 Apr 2008

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Hasebe, N., Shibamura, E., Miyachil, T., Takashima, T., Kobayashi, M., O Okudaira, O., N Yamashita, S., Kobayashi, T., Ishizaki, K., Sakurai, M., Miyajima, M., Fujii, K., Narasaki, S., Takai, K., Tsurumi, H., Kaneko, M., Nakazawa, K., Mori, O., Gasnault, S., ... Grande, M. (2008). Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE. Earth, Planets and Space, 60(4), 299-312.

@article{90f8774f015b49f29607beedcec5b81a,

title = "Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE",

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 Stirling 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. Key words: Moon, gamma-ray spectroscopy, chemical composition, lunar formation and evolution, SELENE (KAGUYA), GRS.",

author = "N. Hasebe and E. Shibamura and T. Miyachil and T. Takashima and M. Kobayashi and {O Okudaira}, O. and {N Yamashita}, S. and T. Kobayashi and K. Ishizaki and M. Sakurai and M. Miyajima and K. Fujii and S. Narasaki and K. Takai and H. Tsurumi and M. Kaneko and K. Nakazawa and O. Mori and S. Gasnault and C. Maurice and M. Grande",

year = "2008",

month = apr,

day = "9",

language = "English",

volume = "60",

pages = "299--312",

journal = "Earth, Planets and Space",

publisher = "TERRA SCIENTIFIC PUBL CO",

number = "4",

}

Hasebe, N, Shibamura, E, Miyachil, T, Takashima, T, Kobayashi, M, O Okudaira, O, N Yamashita, S, Kobayashi, T, Ishizaki, K, Sakurai, M, Miyajima, M, Fujii, K, Narasaki, S, Takai, K, Tsurumi, H, Kaneko, M, Nakazawa, K, Mori, O, Gasnault, S, Maurice, C & Grande, M 2008, 'Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE', Earth, Planets and Space, vol. 60, no. 4, pp. 299-312.

TY - JOUR

T1 - Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE

AU - Hasebe, N.

AU - Shibamura, E.

AU - Miyachil, T.

AU - Takashima, T.

AU - Kobayashi, M.

AU - O Okudaira, O.

AU - N Yamashita, S.

AU - Kobayashi, T.

AU - Ishizaki, K.

AU - Sakurai, M.

AU - Miyajima, M.

AU - Fujii, K.

AU - Narasaki, S.

AU - Takai, K.

AU - Tsurumi, H.

AU - Kaneko, M.

AU - Nakazawa, K.

AU - Mori, O.

AU - Gasnault, S.

AU - Maurice, C.

AU - Grande, M.

PY - 2008/4/9

Y1 - 2008/4/9

N2 - 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 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. Key words: Moon, gamma-ray spectroscopy, chemical composition, lunar formation and evolution, SELENE (KAGUYA), GRS.

AB - 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 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. Key words: Moon, gamma-ray spectroscopy, chemical composition, lunar formation and evolution, SELENE (KAGUYA), GRS.

UR - http://hdl.handle.net/2160/8312

M3 - Article

VL - 60

SP - 299

EP - 312

JO - Earth, Planets and Space

JF - Earth, Planets and Space

IS - 4

ER -

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

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