Gamma-ray spectrometer for Japanese lunar polar orbiter

Details Gamma-ray spectrometer for Japanese lunar polar orbiter Gamma-ray spectrometer for Japanese lunar polar orbiter

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..23.1837h&link_type=abstract

Advances in Space Research, Volume 23, Issue 11, p. 1837-1840.

Computer Science

5

Scientific paper

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.

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