John R. Dunning

John Ray Dunning (September 24, 1907 – August 25, 1975) was an American physicist who played key roles in the Manhattan Project that developed the first atomic bombs. He specialized in neutron physics, and did pioneering work in gaseous diffusion for isotope separation. He was dean of the school of engineering and applied science at Columbia University from 1950 to 1969.

John R. Dunning
John R. Dunning (left) and Hubert Thelen (right) – first cousins, March 1957 after funeral of John's father A.C. Dunning
BornSeptember 24, 1907
Shelby, Nebraska, US
DiedAugust 25, 1975 (1975-08-26) (aged 67)
EducationNebraska Wesleyan University (BA)
Columbia University (MS, PhD)
AwardsMedal for Merit (1946)
Scientific career
Fieldsphysics
Thesis The Emission and Scattering of Neutrons  (1934)
Doctoral advisorGeorge B. Pegram
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