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(Biography) J(ulius) Robert. 1904–67, US nuclear physicist. He was director of the Los Alamos laboratory (1943–45), which produced the first atomic bomb. He opposed the development of the hydrogen bomb (1949) and in 1953 was alleged to be a security risk. He was later exonerated
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Op•pen•heim•er(ˈɒp ənˌhaɪ mər)
J(ulius) Robert, 1904–67, U.S. nuclear physicist.
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