High-purity germanium gamma-ray spectrometer with stirling cycle cryocooler

M. N. Kobayashi, Nobuyuki Hasebe, T. Miyachi, T. Doke, J. Kikuchi, H. Okada, A. Oka, O. Okudaira, H. Souri, N. Yamashita, E. Shibamura, T. Kashiwagi, T. Takashima, K. Narasaki, K. Tsurumi, K. Mori, C. d'Uston, S. Maurice, M. Grande, R. C. Reedy

    研究成果: Article査読

    11 被引用数 (Scopus)

    抄録

    The Japanese lunar polar orbiter SELENE carries a gamma-ray spectrometer which uses a high-purity Ge detector cooled to 80-90 K by a Stirling mechanical cooler. The Gamma-Ray Spectrometer (GRS) consists of a large volume n-type Ge detector (252 cc) as the main detector and bismuth-germanate (BGO) and plastic scintillators as an active shielding. The engineering model still maintains excellent energy resolution even after severe vibration testing. The Gamma-Ray Spectrometer will globally map of the Moon for the major elements of O, Mg, Al, Si, Ti, Fe, etc. and natural radioisotopes of K, Th and U with a high precision. The energy resolution of the GRS is such that it would identify prompt gamma-ray line from hydrogen and the location and the amount of ice, if it exists at the polar regions.

    本文言語English
    ページ(範囲)1927-1931
    ページ数5
    ジャーナルAdvances in Space Research
    30
    8
    DOI
    出版ステータスPublished - 2002

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

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