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The impact of the radiocarbon dating technique on modern man has made it one of the most significant discoveries of the 20th century.
It is rapidly oxidized in air to form carbon dioxide and enters the global carbon cycle.So in order to date most older fossils, scientists look for layers of igneous rock or volcanic ash above and below the fossil.Scientists date igneous rock using elements that are slow to decay, such as uranium and potassium.Gas proportional counting is a conventional radiometric dating technique that counts the beta particles emitted by a given sample. In this method, the carbon sample is first converted to carbon dioxide gas before measurement in gas proportional counters takes place.Liquid scintillation counting is another radiocarbon dating technique that was popular in the 1960s.
Physical and chemical pretreatments are done on these materials to remove possible contaminants before they are analyzed for their radiocarbon content.