Carbon distribution profiles in lunar fines

Details Carbon distribution profiles in lunar fines Carbon distribution profiles in lunar fines

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stin...7721007h&link_type=abstract

Final Report, 1 Feb. 1976 - 31 Jan. 1977 Georgia Inst. of Tech., Atlanta. Solid State Sciences Div.

Physics

Carbon, Lunar Composition, Lunar Soil, Apollo 16 Flight, Auger Spectroscopy, Electron Microscopy, Fines, Ion Irradiation, Radial Distribution, Scanners

Scientific paper

Radial distribution profiles of elemental carbon in lunar soils consisting of particles in the size range of 50 to 150 microns were investigated. Initial experiments on specimen preparation and the analysis of prepared specimens by Auger electron spectrometry (AES) and scanning electron microscopy (SEM) are described. Results from splits of samples 61501,84 and 64421,11, which were mounted various ways in several specimen holders, are presented. A low carbon content was observed in AES spectra from soil particles that were subjected to sputter-ion cleaning with 960eV argon ions for periods of time up to a total exposure for one hour. This ion charge was sufficient to remove approximately 70 nm of material from the surface. All of the physically adsorbed carbon (as well as water vapor, etc.) would normally be removed in the first few minutes, leaving only carbon in the specimen, and metal support structure, to be detected thereafter.

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