Fallout from nuclear weapons tests in the atmosphere is mainly 90 Sr and 137 Cs, which have
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Fallout from nuclear weapons tests in the atmosphere is mainly 90Sr and 137Cs, which have 28.6-and 32.2-y half-lives, respectively. Atmospheric tests were terminated in most countries in 1963, although China only did so in 1980. It has been found that environmental activities of these two isotopes are decreasing faster than their half-lives. Why might this be?
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The environmental activities of 90Sr and 137Cs decreasing faster than their halflives can be attributed to a combination of factors beyond just radioa...View the full answer
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