Particle Track, X-ray, Thermal, and Mass Spectrometric Studies of Lunar Material

Particle tracks in Apollo 11 samples are dominantly of cosmic ray and solar origin: primary galactic and solar flare particles, likely spallation recoil tracks, and possible solar-wind heavy particles. The energy spectrum of irongroup nuclei is inferred from track density gradients in surface layers...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1970-01, Vol.167 (3918), p.568-571
Main Authors: Fleischer, R. L., Haines, E. L., Hanneman, R. E., Hart, H. R., Kasper, J. S., Lifshin, E., Woods, R. T.
Format: Article
Language:English
Subjects:
Argon
Cosmic rays
Crystals
Gases
Lunar soil
Particle tracks
Radioactive decay
Rocks
Soil depth
Spallation
Stable Isotopes, Rare Gases, Solar Wind, and Spallation Products
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Summary:Particle tracks in Apollo 11 samples are dominantly of cosmic ray and solar origin: primary galactic and solar flare particles, likely spallation recoil tracks, and possible solar-wind heavy particles. The energy spectrum of irongroup nuclei is inferred from track density gradients in surface layers, and a limit of
ISSN:0036-8075
1095-9203
DOI:10.1126/science.167.3918.568