First artificial meson production, 1948

First artificial meson production, 1948

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Credit: EMILIO SEGRE VISUAL ARCHIVES/AMERICAN INSTITUTE OF PHYSICS/SCIENCE PHOTO LIBRARY

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Caption: First artificial meson production. Lattes and Gardner using the 184-inch cyclotron at the University of California's Lawrence Radiation Laboratory, USA, to produce the first artificial mesons. At left is Brazilian physicist Cesare Mansueto Giulio Lattes (1924-2005). At right is US physicist Eugene Gardner (1913-1950). They are placing special photographic plates that will capture images of the pi-mesons (pions) produced by bombarding beryllium and carbon with alpha particles. The results were published in March 1948, and led to a Nobel Prize in 1950 for Cecil Powell, the head of the laboratory, but not for Lattes or Gardner. Photographed circa March 1948.Restrictions:

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