Carbon dating inventor
Norris of the Jelliff Manufacturing Corporation and Edward Adler from the City College of New York, which became known as the "Norris-Adler" barrier by late 1942.
In addition to developing a suitable barrier, the SAM Laboratories also had to assist in the design of a gaseous separation plant, which became known as K-25.
Although doubts remained, construction work began on the K-25 full-scale production plant in September 1943. Tests began on the machinery at K-25 in April 1944 without a barrier.
Attention turned to a new process developed by Kellex.
Willard Frank Libby (December 17, 1908 – September 8, 1980) was an American physical chemist noted for his role in the 1949 development of radiocarbon dating, a process which revolutionized archaeology and palaeontology.
For his contributions to the team that developed this process, Libby was awarded the Nobel Prize in Chemistry in 1960.
Radio carbon dating determines the age of ancient objects by means of measuring the amount of carbon-14 there is left in an object.
During World War II he worked in the Manhattan Project's Substitute Alloy Materials (SAM) Laboratories at Columbia University, developing the gaseous diffusion process for uranium enrichment.
He also developed sensitive radiation detectors that could use the technique.
Tests against sequoia with known dates from their tree rings showed radiocarbon dating to be reliable and accurate.
Libby resigned from the AEC in 1959, he became Professor of Chemistry at University of California, Los Angeles (UCLA), a position he held until his retirement in 1976. In 1962, he became the Director of the University of California statewide Institute of Geophysics and Planetary Physics (IGPP), a position he also held until 1976.
His time as director encompassed the Apollo space program and the lunar landings.
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But the only known gas containing uranium was the highly corrosive uranium hexafluoride, and a suitable barrier was hard to find.