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    Rafter carbon dating

    For further details relating to specific samples, we recommend you to contact the laboratory and/or the original archaeologists and submitters.Although carbon dating was invented in the United States by the chemist Willard Libby, New Zealand scientists played a significant part in its early development.Rafter initially concentrated on analysis of coal ash, but gained much acclaim when he worked with rock analyst Fred Seelye on a new method of analysing uranium-bearing minerals found in beach sands on the West Coast of New Zealand.

    It is a dating method used for objects containing carbon that are up to 50,000 years old.On Rafter's return, he began to work with the new technique of radiocarbon dating, which dates organic material by comparing the ratio of radiocarbon atoms (carbon-14) to regular carbon atoms (carbon-12) with established radiocarbon: carbon ratios from the past.Rafter first used the method to date moa bones and ash showers from volcanos on the North Island of New Zealand.Carbon-14, or 14C, is an unstable, or radioactive atomic particle.On average, a particle of 14C will exist on Earth for 8033 years, before it decays, or changes back to 14N by losing an electron.

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