Computer Science
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7..649m&link_type=abstract
In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 1. (A77-34651 15-91) New York, Pergamon
Computer Science
Abundance, Deuterium, Hydrogen Isotopes, Lunar Rocks, Spallation, Water, Basalt, Cosmic Rays, Galactic Radiation, Lunar Surface, Nuclear Reactions, Solar Cosmic Rays
Scientific paper
Hydrogen, water, and deuterium contents have been measured in eight pieces of the basalt sample 70215. For five of the eight pieces, the locations in the whole rock sample are accurately known. Terrestrial contamination seems to be the source of the water extracted from each of the pieces. The average deuterium content of this water is 138 ppm. The relationship observed between the quantities of hydrogen and deuterium released from each piece allows one to estimate the amount of deuterium formed by nuclear reaction on the lunar surface. For rock 70215 this value is equal to 0.46 by 10 to the -10th power mole D2/g for an exposure age of 100 million yr. No depth dependence is found for the amount of deuterium formed. This observation is consistent with a minimum erosion rate of 0.5 mm per million yr. Good agreement is observed between the measured value and the calculations made by Yokoyama and Tobailem (1976). Comparison between deuterium and tritium production rates is tentatively presented.
Lelu M.
Merlivat Liliane
Nief G.
Roth E.
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