14 carbon 14 dating

Carbon 14 is formed from carbon 12 in the atmosphere by the action of cosmic rays.

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The imbalance makes carbon 14 a radioisotope with a half-life of 5,700 years, and an emitter of beta particles.

This radioactive isotope of carbon is called radiocarbon.

It is entirely at odds with everything that is known about nuclear physics.

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Trees and plants that get their carbon from the carbon dioxide of the atmosphere will, while they are living have a percentage of carbon 14 equal to that in the atmosphere.

The same is true of animals that eat plant material.

The amount of carbon dioxide in the atmosphere may have been different in the past.

The assumption of a constant ratio of C-14 to C-12 is invalid; equilibrium would require about 30,000 years, and the C-14/C-12 ratio appears to be increasing still.

When these organisms die, they no longer ingest C-14 (directly or indirectly) from an atmospheric source.

Carbon 14 decays at a particular rate and is not replaced.

The carbon 14 found in nature is constantly being regenerated by cosmic rays hitting the atmosphere.

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