Radiation dating carbon dating

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When cosmic rays enter the atmosphere, they undergo various transformations, including the production of neutrons.

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One side-effect of the change in atmospheric carbon-14 is that this has enabled some options (e.g., bomb-pulse dating Carbon-14 is produced in coolant at boiling water reactors (BWRs) and pressurized water reactors (PWRs).However, open-air nuclear testing between 1955–1980 contributed to this pool.The different isotopes of carbon do not differ appreciably in their chemical properties.A calculation or (more accurately) a direct comparison of carbon-14 levels in a sample, with tree ring or cave-deposit carbon-14 levels of a known age, then gives the wood or animal sample age-since-formation.Carbon-14 is produced in the upper layers of the troposphere and the stratosphere by thermal neutrons absorbed by nitrogen atoms.

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