Carbon 14 used for dating
However, pre-1950 samples that are less than 100 years old or older than 60,000 years cannot be accurately dated.The reason for this has to do with the concentration of C-14 in living materials as well as the half-life of the C-14 isotope.
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In 1960, Libby was awarded the Nobel Prize in chemistry for this work.A special chemical is added to the sample that produces tiny specks of light called scintillations when carbon-14 atoms decay.
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