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Science 1 June 1973:
Vol. 180. no. 4089, pp. 957 - 959
DOI: 10.1126/science.180.4089.957
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Articles

Detection of a Nonuniform Distribution of Polonium-210 on the Moon with the Apollo 16 Alpha Particle Spectrometer

Paul Bjorkholm 1, Leon Golub 1, and Paul Gorenstein 1

1 American Science and Engineering, Cambridge, Massachusetts 02139

The polonium-210 activity of the lunar surface is significantly larger than the activity of its progenitor radon-222. This result establishes unequivocally that radon emanation from the present-day moon varies considerably within the 21-year half-life of lead-210, the parent nuclide of polonium-210. There are large variations and well-localized enhancements in polonium-210 activity over much of the moon's surface.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Detection of Radon Emission at the Edges of Lunar Maria with the Apollo Alpha-Particle Spectrometer.
P. Gorenstein, P. Gorenstein, L. Golub, and P. Bjorkholm (1974)
Science 183, 411-413
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