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Chronology and dating methods
The Record of Time: Chronometric Techniques: Part II
Most of the chronometric dating methods in use today are radiometric. That is to say, they are based on knowledge of the rate at which certain radioactive isotopes within dating samples decay or the rate of other cumulative changes in atoms resulting from radioactivity. Isotopes are specific forms of elements. The various isotopes of the same element differ in terms of atomic mass but have the same atomic number. In other words, they differ in the number of neutrons in their nuclei but have the same number of protons. The spontaneous decay of radioactive elements occurs at different rates, depending on the specific isotope. These rates are stated in terms of half-lives.
Chronometric Methods in Paleoanthropology
Taylor, Martin J. Aitken, eds. Chronometric Dating in Archaeology.
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