EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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John Hasbrouck van Vleck (1899-1980), US physicist. Van Vleck studied at Harvard University, USA, where he spent most of his career. His research concerned various aspects of solid-state physics, in particular the quantum mechanical basis of magnetism, and crystal field theory. It was the former work that led to his being awarded a share of the 1977 Nobel Prize in Physics. He also served on the Los Alamos Review committee in 1943, as part of the Manhattan Project, and contributed to crucial design features of the atomic bomb. He has received the National Medal of Science (USA), and has been awarded the Legion of Honour (France).
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