Radiochemical dating definition chemistry


25-Jul-2015 00:41

The atmospheric concentration of C becomes the fingerprint of this radioisotope in a given year's food supply.Herbivores lag the atmosphere slightly because their primary carbon source is on the order of months old.It is relatively easy to achieve 0.5-0.8% precision when analyzing recent full-sized samples.C has not actually disappeared, it has simply moved out of the atmosphere.The temporal variations of artificially high levels of atmospheric radiocarbon have been captured in organic material world-wide and thus offer an opportunity to determine a date of synthesis for biomolecules.Omnivores and carnivores lag the atmosphere further because their carbon sources are another step removed.

The isotopic content of new plant growth reflects the atmospheric radiocarbon concentration.

New leaves are produced in weeks while larger fruit and vegetables form over the period of a month or two.



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