He did a research project with Linus Pauling as an undergraduate and received his Bachelor of Science degree in 1928 and his Master of Science degree in 1929, writing an unpublished thesis on "An improved method for the determination of the radium content of rocks". Ĭalifornia Institute of Technology (Caltech) was only a mile from his home, and he attended some public lectures there. On October 18, 1908, the family moved to Pasadena, California, where he attended McKinley Elementary School from 1913 to 1918, Grant School from 1918 to 1920, and then Pasadena High School, from which he graduated in 1924. McMillan's father was a physician, as was his father's twin brother, and three of his mother's brothers. He had a younger sister, Catherine Helen, whose son John Clauser (that is, McMillan's nephew) won the Nobel Prize in Physics in 2022. McMillan was born in Redondo Beach, California, on September 18, 1907, the son of Edwin Harbaugh McMillan and his wife Anna Marie McMillan née Mattison. He became director on the death of lab founder Ernest Lawrence later that year, and he stayed in that position until his retirement in 1973. He was appointed associate director of the Radiation Laboratory in 1954, and promoted to deputy director in 1958. McMillan co-invented the synchrotron with Vladimir Veksler, and after the war he returned to the Berkeley Radiation Laboratory to build them. He led teams working on the gun-type nuclear weapon design, and also participated in the development of the successful implosion-type nuclear weapon. In 1942 he joined the Manhattan Project, the wartime effort to create atomic bombs, and he helped establish the project's Los Alamos Laboratory where the bombs were designed. During World War II, he first worked on microwave radar at the MIT Radiation Laboratory, and on sonar at the Navy Radio and Sound Laboratory. For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg.Ī 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. Discovery of neptunium, the first transuranium elementĭeflection of a Beam of HCI Molecules in a Non-Homogeneous Electric Field (1933)Įdwin Mattison McMillan (Septem– September 7, 1991) was an American physicist credited with being the first-ever to produce a transuranium element, neptunium.
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