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Plutonium-238 in Fallout
T. Mamuro and T. Matsunami
New Series, Vol. 163, No. 3866 (Jan. 31, 1969), pp. 465-467
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1724818
Page Count: 3
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The observed variation in the activity ratio of plutonium-238 to plutonium-239 plus plutonium-240 in rainwater in Japan over the period from 1961 through 1968 seems to indicate that the influence of the plutonium-238 released by the burnup of the nuclear auxiliary power generator (SNAP-9A) became noticeable within about 6 months and that variation in the isotope ratio with time is affected by nuclear debris produced in the latest explosions as well as by the plutonium-238 released from the SNAP-9A generator.
Science © 1969 American Association for the Advancement of Science