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Radiocarbon Tree-Ring Calibration. Devices of Measure, Half-life, together with requirement for Calibration Carbon-14 is just an isotope that is naturally occurring of element carbon. Additionally it is called “radiocarbon” since it is unstable and radioactive in accordance with carbon-13 and carbon-12. Carbon includes 99% carbon-12, 1% carbon-13, and about one component per million carbon-14. Link… Leer más »