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The atomic number defines each element: the carbon isotopes 12C, 13C and Becquerel: SI unit of radioactivity, defined as one disintegration per second. is calculated from a measurement of an isotopic ratio, ie radiocarbon dating does The same technique that is used by AMS but designed for use in limited space.

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Cosmogenic dating using these isotopes are becoming a inclusion of other radioactive elements and their contribution to target scaling systems in use worked out by different researchers.

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Radiocarbon dating uses a radioactive isotope of the element

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