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National Museum of Nuclear Science & History

Oral Histories

Roger Hildebrand’s Interview

Roger Hildebrand is an American physicist and the S.K. Allison Distinguished Service Professor, Emeritus, at the University of Chicago. His involvement with the Manhattan Project began with a tap on the shoulder by Ernest Lawrence, who convinced Hildebrand to shift from being a chemist to a physicist. He worked with cyclotrons and mass spectrometers at Berkeley before transferring to the Y-12 Plant in Oak Ridge. In this interview, Hildebrand shares his memories of Lawrence, Enrico Fermi, Samuel Allison, and other Manhattan Project scientists. He recalls his postwar work at the University of Chicago, and the pressure he felt after being asked to be a substitute in one of Fermi’s classes.

Peter Vandervoort’s Interview

Peter Vandervoort is an American astrophysicist and professor emeritus at the University of Chicago. In this interview, Vandervoort shares stories about the university’s role in the Manhattan Project. He describes in depth how different buildings on its campus were appropriated for the project. He later discusses his interactions with the university’s distinguished physics faculty members after the war, such as Nobel Prize winner Subrahmanyan Chandrasekhar, who was Vandervoort’s Ph.D. advisor in the 1950s. Vandervoort also talks about the university’s community outreach efforts through the years. He concludes the interview by discussing the contributions of women to physics.

Alexander Langsdorf’s Interview

Dr. Alexander Langsdorf was an American physicist who worked under Enrico Fermi at the University of Chicago. He helped design the nuclear reactor Chicago Pile-2, following the success of Chicago Pile-1. After the war, Langsdorf become an outspoken opponent of the proliferation of nuclear weapons and helped found the Bulletin of the Atomic Scientists. In this conversation with author Stephane Groueff, Langsdorf describes how he became involved in the Manhattan Project, his decision to stay in Chicago rather than go to Los Alamos, the genius of Enrico Fermi, and the process of designing and building a heavy water nuclear reactor. He discusses the personalities of many of his superiors, including Walter Zinn, Arthur Compton, Norman Hilberry, Samuel Allison, and Fermi.