Chamberlain, Owen, 1920–, American physicist, b. San Francisco, Calif., Ph.D. Univ. of Chicago, 1948. He was on the faculty at the Univ. of California, Berkeley, from 1949 until his retirement in 1989, when he was named professor emeritus. Chamberlain received the 1959 Nobel Prize in Physics with Emilio Segrè for producing and identifying the antiproton, a subatomic particle identical to the proton but with a negative electrical charge. Their 1955 finding set the stage for the discovery of many additional antiparticles, and antiprotons have since become an integral part of high-energy physics experiments.
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