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Effective half-life denotes the halving of radioactive material in a living organism by means of radioactive decay and biological excretion. A decay constant is needed to calculate the half-life. It is the sum of the biological and physical decay constants, as in the formula:
With the decay constant it is possible to calculate the effective half-life using the formula:
The biological decay constant is often approximated as it is more difficult to accurately determine than the physical decay constant.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Effective_half-life". A list of authors is available in Wikipedia.|