^ Lowe D (1989). "Problems associated with the use of coal as a source of C14-free background material". Radiocarbon. 31 (2): 117–120. Bibcode: 1989Radcb..31..117L. doi: 10.1017/S0033822200044775. Archived from the original on 2013-07-24. ^ Jull AJ, Barker D, Donahue DJ (1985).
History of Radiocarbon-14 Dating The method developed in the 1940's and was a ground-breaking piece of research that would change dating methods forever. A team of researchers led by Willard F. Libby calculated the rate of radioactive decay of the 14 C isotope (4) in carbon black powder. As a test, the team took samples of acacia wood from two Egyptian Pharaohs and dated them; the results came ...