radioactive carbon dating
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... 放射性碳测定年代 radiocarbon dating 放射性碳测定年龄 radioactive carbon dating 放射性碳地层学 radiocarbon stratigraphy ...
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There are many different isotopes of carbon and one that we have probably heard of is in the form of carbon-14, known for radio-carbon dating, but where does this radioactive isotope come from?
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Although there were no machines for detecting them systematically before 1935, cosmic rays have left their footprints in the geological record by creating radioactive elements such as the carbon-14 used in carbon-dating.
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