Cd carbon dating
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We have calculated isotope shifts for several one- and two-photon transitions in neutral carbon.
More research is necessary to explain past changes in COC produced by atmospheric weapons testing (between 19), as it dissolves in surface oceans and is taken up and respired by land plants can be traced.
On longer timescales, the radioactive decay of C provides information on slower exchanges with the much larger stores of carbon in the deep ocean and the carbon stabilized in soils and sediments.
The predominance of 14C-depleted air in the northern hemisphere is the result of burning of fossil fuels, which contian zero radiocarbon.
An atmosheric measurement program to test these predictions would be useful in reducing uncertainty about the present sources and sinks of carbon dioxide.
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