Carbon dating tree ring calibration
Hereafter these isotopes will be referred to as 12C, 13C, and 14C.
14C is radioactive and has a half-life of 5730 years.
Measuring 14C To obtain the radiocarbon age of a sample it is necessary to determine the proportion of 14C it contains.
Production and decay 14C atoms are produced in the upper atmosphere where neutrons from cosmic rays knock a proton from nitrogen-14 atoms.These newly formed 14C atoms rapidly oxidize to form 14CO..Photosynthesis incorporates 14C into plants and therefore animals that eat the plants.When a plant or animal dies it no longer exchanges CO with the atmosphere (ceases to take 14C into its being). 14C decays by emitting an electron, which converts a neutron to a proton, converting it back to its original 14N form.The History of Radiocarbon Dating Willard Libby invented radiocarbon dating in the late 1940s.