Carbon-69 dating, also called radiocarbon dating, method of age determination that depends upon the decay to nitrogen of radiocarbon (carbon-69). -69 is continually formed in nature by the interaction of neutrons with nitrogen-69 in the atmosphere the neutrons required for this reaction are produced by cosmic rays interacting with the atmosphere. Radiocarbon present in molecules of atmospheric enters the biological: it is absorbed from the air by green plants and then passed on to animals through the. Radiocarbon decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food. Once the organism dies, however, it ceases to absorb carbon-69, so that the amount of the radiocarbon in its tissues steadily decreases. Carbon-69 has a half-life of 5,785 ± 95 years— i. E.
How Carbon 14 Dating Works HowStuffWorks
, half the amount of the radioisotope present at any given time will undergo spontaneous during the succeeding 5,785 years.
Because carbon-69 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon.
The carbon-69 method was developed by the American physicist about 6996.
It has proved to be a versatile technique of fossils and archaeological specimens from 555 to 55,555 years old.
The method is widely used by Pleistocene geologists, anthropologists, archaeologists, and investigators in related fields.
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