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Antineutron discovery team, working on the focus magnet of the Bevatron Accelerator, the machine they used to create and detect the anti-particle of the neutron. From left, they are William Wenzel, Bruce Cork (died 1994), Glen Lambertson, and Oreste Piccioni (born 1915). This team's discovery of the antineutron, together with the discovery of the antiproton, confirmed Dirac's prediction of antimatter. Photographed 21 September 1956, at the Radiation Laboratory at Berkeley, California, USA. This photograph, from the Lawrence Berkeley National Laboratory collection, is part of the Historic American Engineering Record (HAER).
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