Edwin McMillan

Edwin McMillan
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Name	Edwin McMillan
Caption	Edwin McMillan in 1951
Birth date	18 September 1907
Birth place	Redondo Beach, California
Death date	07 September 1991
Death place	El Cerrito, California
Nationality	American
Fields	Nuclear physics
Workplaces	University of California, Berkeley, Lawrence Berkeley National Laboratory
Alma mater	California Institute of Technology, Princeton University
Doctoral advisor	Edward Condon
Known for	Discovery of neptunium, Development of the synchrotron
Prizes	Nobel Prize in Chemistry (1951), Atoms for Peace Award (1963), National Medal of Science (1990)

Edwin McMillan was an American physicist whose pioneering work in nuclear chemistry and particle accelerator design fundamentally advanced modern science. He is best known for the discovery of the first transuranium element, neptunium, and for his crucial innovations in developing the synchrotron, a revolutionary type of particle accelerator. For these achievements, he was awarded the Nobel Prize in Chemistry in 1951, sharing the honor with Glenn T. Seaborg. His career was largely centered at the University of California, Berkeley and the Lawrence Berkeley National Laboratory, where he later served as director.

Early life and education

Edwin Mattison McMillan was born in Redondo Beach, California, and demonstrated an early aptitude for science and mathematics. He pursued his undergraduate studies in physics at the California Institute of Technology, graduating in 1928 and subsequently earning a master's degree in 1929. For his doctoral work, he moved to Princeton University, where he studied under theoretical physicist Edward Condon and conducted research on the molecular beam method, receiving his Ph.D. in 1932. Following his graduation, he was awarded a National Research Council fellowship, which brought him to the University of California, Berkeley, to work at the burgeoning Radiation Laboratory founded by Ernest O. Lawrence.

Scientific career and research

Joining the faculty at the University of California, Berkeley, McMillan became deeply involved in the research programs at the Lawrence Berkeley National Laboratory. In 1940, working with physicist Philip Abelson, he successfully identified element 93, created by bombarding uranium with neutrons in the cyclotron. They named the new element neptunium, after the planet Neptune, extending the periodic table beyond uranium. During World War II, McMillan contributed to vital wartime research, including work on radar at the Massachusetts Institute of Technology and on sonar at the Naval Research Laboratory. After the war, he returned to Berkeley and made his second major contribution by conceiving and developing the principle of phase stability, which led to the creation of the synchrotron, enabling the acceleration of particles to much higher energies than previously possible.

Nobel Prize in Chemistry

In 1951, Edwin McMillan was awarded the Nobel Prize in Chemistry jointly with his colleague Glenn T. Seaborg. The Royal Swedish Academy of Sciences recognized them "for their discoveries in the chemistry of the transuranium elements." McMillan's specific citation was for his identification of neptunium, the first element heavier than uranium to be synthesized. This groundbreaking work, conducted with the cyclotron at the University of California, Berkeley, opened the door to the entire field of transuranium element research and the expansion of the periodic table.

Later life and legacy

Following his Nobel Prize, McMillan continued his influential career in research and scientific leadership. He succeeded Ernest O. Lawrence as director of the Lawrence Berkeley National Laboratory in 1958, a position he held until 1973. Under his guidance, the laboratory pursued major projects in high-energy physics and nuclear science. He was also a professor of physics at the University of California, Berkeley, until his retirement in 1974. McMillan's legacy endures through the ongoing use of synchrotron technology in facilities like the Stanford Linear Accelerator Center and the European Organization for Nuclear Research for fundamental research in physics, chemistry, and materials science.

Honors and awards

Throughout his distinguished career, Edwin McMillan received numerous prestigious accolades. In addition to the Nobel Prize in Chemistry, he was awarded the Atoms for Peace Award in 1963. He received the National Medal of Science from President George H. W. Bush in 1990. He was elected to several eminent societies, including the National Academy of Sciences, the American Academy of Arts and Sciences, and the American Philosophical Society. Other significant honors include the Richtmyer Memorial Award from the American Association of Physics Teachers and the John Ericsson Medal from the American Society of Mechanical Engineers.

Category:American Nobel laureates Category:American nuclear physicists Category:University of California, Berkeley faculty