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National Museum of Nuclear Science & History

Oral Histories

Raymond Sheline’s Lecture

Raymond Sheline was a chemist who worked on the Manhattan Project at Columbia University, Oak Ridge, and Los Alamos. Sheline received his Ph.D. from the University of California at Berkeley in 1949 and was a professor at Florida State University for 48 years. Among other accomplishments, he helped establish a nuclear chemistry lab at the Niels Bohr Institute in Copenhagen and published more than 400 scientific papers. In this lecture, Sheline discusses how he initially joined the Manhattan Project, his work on gaseous diffusion at Columbia University under Nobel Prize winner Harold Urey and how he became a member of the Special Engineer Detachment. He also delves into the history of nuclear physics, providing an overview of key discoveries and personalities including J. Robert Oppenheimer, Enrico Fermi, and Edward Teller.

Clarence Larson’s Interview

Dr. Clarence Larson, a chemist, began working under Ernest O. Lawrence in his lab at the University of California, Berkeley in 1942. In 1943, he moved to Oak Ridge and was appointed head of technical staff for the Tennessee Eastman Corporation. He later served as director of Oak Ridge National Laboratory and as a commissioner on the U.S. Atomic Energy Commission. During the Manhattan Project, Larson designed a process to recover and purify uranium deposits from the walls of calutron receivers at the Y-12 Plant. In this interview, he explains the importance of this innovation in producing enough enriched uranium for an atomic bomb. He also describes the challenges encountered in the Y-12 Plant’s early days, as well as Lawrence’s leadership skills and unyielding confidence.

Alfred Nier’s Interview – Part 2

Dr. Alfred Nier was an American physicist well-known for his work on spectrometry. Nier designed the mass spectrometers used for Manhattan Project experiments and his instruments were sent to all of the major Project sites. With his mass spectrometer, Nier helped prove that that U-235 was fissile, not the more abundant isotope U-238. Nier worked for the Kellex Corporation to design and construct the apparatuses used to monitor the separation of Uranium-235 and Uranium-238, as well as leak detectors for the K-25 gaseous diffusion plant. In this interview, Nier discusses his early involvement in the Manhattan Project in New York and the transport of uranium between Project sites. He also discusses his experiences working at both the Nash Garage Building in New York City, and the K-25 Plant at Oak Ridge, Tennessee.

Alfred Nier’s Interview – Part 1

Dr. Alfred Nier was an American physicist well-known for his work on spectrometry. Nier designed the mass spectrometers used for Manhattan Project experiments and his instruments were sent to all of the major Project sites. With his mass spectrometer, Nier helped prove that that U-235 was fissile, not the more abundant isotope U-238. Nier worked for the Kellex Corporation to design and construct the apparatuses used to monitor the separation of Uranium-235 and Uranium-238, as well as leak detectors for the K-25 gaseous diffusion plant. In this interview, Nier describes in detail his instrumentation at the University of Minnesota and his work leading up to the Manhattan Project.

Lew Kowarski’s Interview – Part 1

Lew Kowarski was a Russian-born French physicist who worked as part of the team that discovered that neutrons were emitted in the fission of uranium-235 in the 1930s, setting the groundwork for the use of nuclear chain reactions in the design of the atomic bomb. After the Second World War, Kowarski went on to supervise the first French nuclear reactors and became a staff member of the European Organization for Nuclear Research, or CERN, in 1953. In this interview Kowarski discusses his upbringing in Russia, and the beginnings of his scientific career under Frédéric Joliot-Curie. He also outlines the process through which the splitting of uranium atoms was realized.