Leon Lederman, American physicist

Leon Lederman, American physicist

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Credit: FERMILAB/SCIENCE PHOTO LIBRARY

Caption: Leon Lederman. Portrait of Leon Max Lederman (1922 -), American physicist. Lederman studied muons, a type of subatomic particle. In 1962 he led a team which found that two types of neutrino particles were produced when a muon decayed. This provided evidence that fundamental particles are split into distinct generations. In 1977 he led a team which discovered the upsilon particle, the first particle found to contain the bottom quark. He also discovered the long-lived kaon particle. He was director of the Fermi National Accelerator Laboratory (Fermilab) during 1979-89. Lederman shared the 1988 Nobel Prize for Physics. Photographed in 1994.

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Keywords: 1988, bottom, discoverer, kaon, lederman, leon, long-lived, muon decay, nobel laureate, nobel prize, physicist, physics, pioneer, portraits, quark, recipient, surname l, upsilon particle, winner

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