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Science 29 January 1971:
Vol. 171. no. 3969, pp. 372 - 374
DOI: 10.1126/science.171.3969.372
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Articles

Extralunar Dust in Apollo Cores?

D. J. Barber 1, I. Hutcheon 1, and P. B. Price 1

1 Department of Physics, University of California, Berkeley 94720

Densities of nuclear tracks exceed 1011 per square centimeter in several percent of the micrometer-size silicate grains from all depths in the 12-and 60-centimeter lunar cores. Either these grains were irradiated in space as extralunar dust or the ratio of iron to hydrogen in low-energy (about 1 million electron volts per nucleon) solar particles is orders of magnitude higher than in the photosphere.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Electron Microscopy of Irradiation Effects in Space.
M. Maurette and P. B. Price (1975)
Science 187, 121-129
   PDF »
Allende Meteorite: A High-Voltage Electron Petrographic Study.
H. W. Green, H. W. Green II, S. V. Radcliffe, and A. H. Heuer (1971)
Science 172, 936-939
   Abstract »    PDF »
Solar Particle Tracks in Glass from the Surveyor 3 Spacecraft.
G. Crozaz, G. Crozaz, and R. M. Walker (1971)
Science 171, 1237-1239
   Abstract »    PDF »


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