ESR dating of tooth enamel from prehistoric archaeological sites
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Electron spin resonance (ESR) can be used to date hydroxyapatite of tooth enamel, a common component of prehistoric archaeological sites. Dates, ranging from 10 ka to ∼ 3 Ma, are calculated from the accumulated radiation dose, A, and the dose rate, D, which varies with time as a result of uptake of U and growth of U-daughters to secular equilibrium.
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Applied Geochemistry