Beryllium-10 from the Sun

Details Beryllium-10 from the Sun Beryllium-10 from the Sun

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sci...294..352n&link_type=abstract

Science, Volume 294, Issue 5541, pp. 352-354 (2001).

Computer Science

11

Scientific paper

Beryllium-10 (10Be) in excess of that expected from in situ cosmic ray spallation reactions is present in lunar surface soil 78481; its presence was revealed with a sequential leaching technique. This excess 10Be, representing only 0.7 to 1.1% of the total 10Be inventory, is associated with surface layers (<1 micrometer) of the mineral grains composing 78481. This excess 10Be and its association with surficial layers corresponds to (1.9 +/- 0.8) × 108 atoms per square centimeter, requiring a 10Be implantation rate of (2.9 +/- 1.2) × 10-6 atoms per square centimeter per second on the surface of the Moon. The most likely site for the production of this excess 10Be is the Sun's atmosphere. The 10Be is entrained into the solar wind and transported to the lunar surface.

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