Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Haakon Chevalier

Professor of French LiteratureUniversity of California, Berkeley

Haakon Chevalier in 1934. Photo courtesy of the Bancroft Library. Listen to Haakon Chevalier's Oral History on Voices of the Manhattan Project

Haakon Chevalier was a professor of French literature at the University of California, Berkeley. He was a close friend of J. Robert Oppenheimer. He was politically active at Berkeley, joining the Teachers’ Union and the ACLU. He was very left-wing and may have been a member of the Communist Party.

In early 1943,  Chevalier told Oppenheimer that he knew of a way to pass information to the Soviets. Oppenheimer rejected Chevalier’s offer, but did not report the exchange for eight months. The Chevalier offer, and Oppenheimer’s belated reporting of it, were dredged up and used against him in 1954 at the hearing that revoked his security clearance. For more information, see Oppenheimer Security Hearing.

Because of his political leanings, Chevalier lost his job at Berkeley in 1950. He was unable to find another professorship in the United States and moved to France. He died in 1985 in Paris.

Related Profiles

Paul Aebersold

Oak Ridge, TN

Paul Aebersold (1910-1967) was a nuclear physicist. He wrote his dissertation at Berkeley on “The Collimation of Fast Neutrons” and was involved in the development of the cyclotrons under Ernest Lawrence.

Bert Tolbert

University of California, Berkeley

Bert Tolbert joined the Manhattan Project in 1944 while completing his PhD in Chemistry from the University of California at Berkeley.

Eric Burhop

University of California, Berkeley

Eric Burhop (1911-1980) was an Australian physicist and mathematician. Burhop’s career in physics began at the University of Melbourne.

Geoffrey F. Chew

Los Alamos, NM

Geoffrey Chew was an American physicist. Born and raised in Washington, DC, Chew graduated from high school at the age of 16.