Intensity Variation of Gamma Rays due to Water Concentrations on the Lunar Surface

Details Intensity Variation of Gamma Rays due to Water Concentrations on the Lunar Surface Intensity Variation of Gamma Rays due to Water Concentrations on the Lunar Surface

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apsp.conf..829i&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 10th Conference. Held

Physics

Medical Physics

Scientific paper

Fluxes of gamma rays emitted from the lunar surface consisting from ferroan anorthosite with various concentration of water (H2O) were calculated with Geant4. They are useful to the current and future lunar missions for the projects to search for the existence of water in the lunar polar regions with a gamma-ray spectrometer. The result thus obtained indicates that the flux of gamma-rays with 2223 keV due to the reactions 1H(n, γ)2D has a monotonous dependence on the concentration of H2O from 0.1 to 20 wt% and the flux of 4934 keV gamma-rays due to the reactions 28Si(n, γ)29Si is remarkably correlated with the abundance of H2O. The variation of these gamma-ray fluxes dependent on the concentration of H2O is also discussed with the neutron density profile in the lunar subsurface.

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