Origins & Early Life

Edwin Mattison McMillan (September 18, 1907 – September 7, 1991) was an American physicist credited with being the first to produce a transuranium element, neptunium. For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg. A graduate of California Institute of Technology, he earned his doctorate from Princeton University in 1933, and joined the Berkeley Radiation Laboratory where he discovered oxygen-15 and beryllium-10. During World War II, he worked on microwave radar at the MIT Radiation Laboratory, and then on sonar at the Navy Radio and Sound Laboratory.

Pivotal Works & Achievements

In 1942 he joined the Manhattan Project, the wartime effort to create the atomic bomb and helped establish its Los Alamos Laboratory where the bomb was designed. He led teams working on the gun-type nuclear weapon design, and also participated in the development of the implosion-type nuclear weapon. McMillan co-invented the synchrotron with Vladimir Veksler, and after the war he returned to the Berkeley Radiation Laboratory to build them. He was appointed associate director of the Radiation Laboratory in 1954 and promoted to deputy director in 1958. He became director upon the death of lab founder Ernest Lawrence...

Enduring Legacy & Impact

The historical impact and works continue to influence the modern world.

Contemporary Figures & Related Historical Timelines

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• Abby Stein — Contemporary (Born in 1991) (1991): Israeli-American author, rabbi, and activist who speaks on faith and gender identity.
• Andros Townsend — Contemporary (Born in 1991) (1991): English professional footballer known for his time at Tottenham Hotspur and subsequent moves.
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• Adrien-Marie Legendre — Shared historical date (09-18 · Born) (1752): Pioneering French mathematician known for Legendre polynomials and least squares method.
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• A. J. P. Taylor — Shared historical date (09-07 · Died) (1990): Influential English historian specializing in 19th and 20th-century European diplomacy.
• Abraham Isaac Kook — Shared historical date (09-07 · Born) (1865): Pioneering Orthodox Rabbi and Father of Religious Zionism.
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