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Martin Kamen and Sam Ruben discover carbon-14.
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Martin Kamen
American chemist (1913–2002)
Martin David Kamen was an American chemist who, together with Sam Ruben, co-discovered the synthesis of the isotope carbon-14 on February 27, 1940, at the University of California Radiation Laboratory, Berkeley. He also confirmed that all of the oxygen released in photosynthesis…Source: Wikipedia (CC BY-SA)
Sam Ruben
American chemist (1913–1943)
Samuel Ruben was an American chemist who with Martin Kamen co-discovered the synthesis of the isotope carbon-14 in 1940.Source: Wikipedia (CC BY-SA)
Carbon-14
Radiosotope of carbon
Carbon-14, C-14, 14C or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Its presence in organic matter is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date…Source: Wikipedia (CC BY-SA)