Other
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.285..363h&link_type=abstract
(Royal Society, Discussion on the Moon - A New Appraisal from Space Missions and Laboratory Analyses, London, England, June 9-12
Other
5
Lunar Rocks, Micrometeorites, Particle Collisions, Solar Wind, Sputtering, Albedo, Chemical Effects, Escape Velocity, Fines, Granular Materials, Metal Particles, Proton Impact, Solar Activity Effects
Scientific paper
Using available data from the literature, an outline is formulated for the major physical and chemical effects expected during solar-wind bombardment of the lunar regolith. In agreement with results of Auger and other analyses of the composition of lunar grain surfaces, this outline predicts that solar-wind sputtering will tend to clean exposed grain surfaces by ejecting material at velocities exceeding lunar escape velocity. Results are also discussed which show that Fe is partially reduced in the outer few 10 nm of grain surfaces and that this reduced Fe forms 10-nm-diameter metal spheres throughout the glass during agglutinate formation by micrometeorite impacts. These metal spheres give the agglutinates their distinctive optical and magnetic properties and are partially responsible for the decreasing albedo of the lunar surface with exposure age.
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