Francis Simon

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**Sir Francis Simon**
Sir Frances Simon (né Franz Eugen Simon)
Born	July 2, 1893 Berlin, Germany
Died	October 31, 1956 Oxford, UK
Residence	Germany, UK
Nationality	German- British
Field	Physicist
Institution	University of Oxford
Alma mater	University of Berlin
Academic advisor	Walther Nernst
Notable students	Kurt Mendelssohn
Known for	Uranium-235
He is the first cousin of Kurt Mendelssohn.

Sir Francis Simon, born Franz Eugen Simon (1893-1956), was a German and later British physical chemist and physicist who devised the method, and confirmed its feasibility, of separating the isotope Uranium-235 and thus made a major contribution to the creation of the atomic bomb.

He was born to a Jewish family in Berlin and won the Iron Cross First Class during World War I. He received his doctoral degree from the University of Berlin, working in the research group of Walther Nernst on low-temperature physics related to the Nernst Heat Theorem (Third law of thermodynamics). The rise of anti-semitic fascism in Germany in the 1930s caused him to emigrate to the UK, where he started using the assimilated name "Francis".

[edit] Career

He was invited by Frederick Lindemann, 1st Viscount Cherwell to join the Clarendon Laboratory, University of Oxford in 1933. He became reader in thermodynamics in 1936.

He performed pioneering work in low temperature physics, in particular in solidifying helium. He was commissioned by the MAUD Committee to investigate the feasibility of separating uranium-235 by gaseous diffusion in 1940 which was done with his collaborator, Nicholas Kurti. This technology was transferred to the Manhattan Project.

He became a professor at Oxford University and a Student of Christ Church, Oxford in 1945. He became Dr. Lee's Professor of Experimental Philosophy and head of the Clarendon Laboratory in 1956, one month before his death.