14 carbon 14 dating

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The result is that carbon 14 is present as a constant percentage of the total carbon in the atmosphere, although it does change slightly depending upon the amount of cosmic radiation reaching the atmosphere.However, a correction can be made on the basis of carbon 14 readings on items whose age is known from archeological records.

A steady state results in which the rate of decomposition of carbon 14 is matched by the rate of formation of new C-14 by cosmic rays.The level of C-14 in mollusk shells reflects their source of carbonate.Creationists assume, usually on the basis of a "flood" argument, that there have been large changes in the amount of carbon dioxide in the atmosphere during the past several thousand years.Neutrons are ejected from nuclei of the upper atmosphere in collisions with cosmic rays (A).Captured by nitrogen nuclei (N-14), neutrons transform these nuclei into carbon-14 (B).

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