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; Claude d'Ustona; Robert C. Reedy; Manuel Grande

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 MauriceClaude d'Ustona, Robert C. Reedy, Manuel Grande

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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

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., 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., ... Grande, M. (2008). Gamma-ray spectrometer (GRS) for lunar polar orbiter SELENE. Earth, Planets and Space, 60(4), 299-312.

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.

@article{d318fee3008d4208943600aa3659aaee,

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 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.",

keywords = "Chemical composition, Gamma-ray spectroscopy, GRS, Lunar forman and evolution, Moon, SELENE (KAGUYA)",

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 Claude d'Ustona and Reedy, {Robert C.} and Manuel Grande",

year = "2008",

language = "English",

volume = "60",

pages = "299--312",

journal = "Earth, Planets and Space",

issn = "1343-8832",

publisher = "Terra Scientific Publishing Company",

number = "4",

}

TY - JOUR

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

AU - Hasebe, Nobuyuki

AU - Shibamura, Eido

AU - Miyachi, Takashi

AU - Takashima, Takeshi

AU - Kobayashi, Masanori

AU - Okudaira, Osamu

AU - Yamashita, Naoyuki

AU - Kobayashi, Shingo

AU - Ishizaki, Takeshi

AU - Sakurai, Kunitomo

AU - Miyajima, Mitsuhiro

AU - Fujii, Masayuki

AU - Narasaki, Keisuke

AU - Takai, Shigeki

AU - Tsurumi, Katsuhiro

AU - Kaneko, Hiroshi

AU - Nakazawa, Michio

AU - Mori, Kunishiro

AU - Gasnault, Olivier

AU - Maurice, Sylvestre

AU - d'Ustona, Claude

AU - Reedy, Robert C.

AU - Grande, Manuel

PY - 2008

Y1 - 2008

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 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.

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 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.

KW - Chemical composition

KW - Gamma-ray spectroscopy

KW - GRS

KW - Lunar forman and evolution

KW - Moon

KW - SELENE (KAGUYA)

UR - http://www.scopus.com/inward/record.url?scp=46849109314&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46849109314&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:46849109314

SN - 1343-8832

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

Abstract

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this