This Day In History
Sunday, May 31, 2020
On This Day

February 27, 1940

Martin Kamen and Sam Ruben discover carbon-14 Carbon-14, or radiocarbon, is a radioactive isotope of carbon with a nucleus containing 6 protons and 8 neutrons. Its presence in organic materials is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949), to date archaeological, geological, and hydrogeological samples. Carbon-14 was discovered on 27 February 1940, by Martin Kamen and Sam Ruben at the University of California Radiation Laboratory in Berkeley, although its existence had been suggested by Franz Kurie in 1934.
carbon-14,radiocarbon,Martin Kamen,Sam Ruben
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