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Record 1 of 3768
Solar wind rare gas analysis: Trapped solar wind helium and neon in Surveyor 3 material
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Author and Affiliation:
Buehler, F.(Bern Univ., Bern, Switzerland)
Eberhardt, P.(Bern Univ., Bern, Switzerland)
Geiss, J.(Bern Univ., Bern, Switzerland)
Schwarzmueller, J.(Bern Univ., Bern, Switzerland)
Abstract: The He-4 and Ne-20 contents in sections of the Surveyor 3 support strut samples were determined by optical and scanning electron microscopy and are compared to the results of the Apollo solar wind composition (SWC) experiments. The He-4/Ne-20 ratio in the samples from the sunlit side of the strut was approximately 300; the ratios determined in Apollo 12 lunar fines and SWC foil were below 100. The He-4/He-3 ratios were also determined, and the ratio obtained from Surveyor 3 material is higher than those found with Apollo 11 and 12 SWC experiments. The effects of spallation by cosmic rays or solar protons, stripping by cosmic ray or energetic solar alpha particles, recycling of solar wind He and radiogenic Ne, He from terrestrial atmosphere, mass discrimination near the moon, mass dependence of trapping probability, diffusion, and contamination by lunar dust are considered.
Publication Date: Jan 01, 1972
Document ID:
19720019110
(Acquired Nov 22, 1995)
Accession Number: 72N26760
Subject Category: SPACE RADIATION
Document Type: Technical Report
Publication Information: SEE N72-26731 17-30; NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p. p 201-208
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Bern Univ.; Bern, Switzerland
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: HELIUM ISOTOPES; LUNAR ENVIRONMENT; NEON ISOTOPES; SOLAR WIND; SURVEYOR 3 LUNAR PROBE; APOLLO 11 FLIGHT; APOLLO 12 FLIGHT; ELECTRON MICROSCOPES; LUNAR DUST; SCANNING ELECTRON MICROSCOPY
Imprint And Other Notes: In NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12 p 201-208 (SEE N72-26731 17-30)
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