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    Radio carbon dating how does it work

    Some of these neutrons hit nearby nitrogen atoms, turning them into atoms of carbon-14.

    The atmosphere contains many stable carbon atoms and relatively few radiocarbon atoms.

    Bones and teeth from animals and humans, as well as artefacts made out of wood, fabric or paper are just some of the objects that can be aged using this process.

    This dating method works by measuring the ratio of different isotopes of carbon in a sample using a particle accelerator, such as the ANTARES accelerator at ANSTO. The carbon-12 isotope makes up 99% of all carbon on earth, carbon-13 accounts for almost 1%, and carbon-14 is found in trace amounts.

    When the organism dies, the ratio of carbon-14 to carbon-12 decreases, as carbon-14 decays and is no longer incorporated into the organism.

    Radiocarbon dating can date samples up to 50,000 years old.

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