Donald Cooksey and G. K. Green view the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley

(L-R): Donald Cooksey and G. K. Green view the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley. The machine was the most powerful atom-smasher in the world at the time. It had started operating early in the year. During the period of the photograph Dr. Edwin M. McMillan was doing the work which led a year later to the discovery of neptunium (element 93) a year later. The instrument was used later by Dr. Glenn T. Seaborg and his colleagues for the discovery of element 94 (plutonium) early in 1941. Subsequently, other transuranium elements were discovered with the machine, as well as many radioisotopes, including carbon-14. For their work, Drs. Seaborg and McMillan shared the Nobel Prize in 1951. The machine was used for the "long bombardments" which produced the first weighable and visible quantities of plutonium, which was used at Chicago by Seaborg and his colleagues to work out the method for separating plutonium on an industrial scale at the Hanford, Washington, plutonium production plant. The historic instrument was dismantled at the end of June, 1962, and the magnet sent to the Davis campus of the University of California, to be converted into a more modern machine., Credit Line: Lawrence Berkeley National Laboratory, courtesy AIP Emilio Segrè Visual Archives, Fermi Film Collection
Abstract/Description: (L-R): Donald Cooksey and G. K. Green view the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley. The machine was the most powerful atom-smasher in the world at the time. It had started operating early in the year. During the period of the photograph Dr. Edwin M. McMillan was doing the work which led a year later to the discovery of neptunium (element 93) a year later. The instrument was used later by Dr. Glenn T. Seaborg and his colleagues for the discovery of element 94 (plutonium) early in 1941. Subsequently, other transuranium elements were discovered with the machine, as well as many radioisotopes, including carbon-14. For their work, Drs. Seaborg and McMillan shared the Nobel Prize in 1951. The machine was used for the "long bombardments" which produced the first weighable and visible quantities of plutonium, which was used at Chicago by Seaborg and his colleagues to work out the method for separating plutonium on an industrial scale at the Hanford, Washington, plutonium production plant. The historic instrument was dismantled at the end of June, 1962, and the magnet sent to the Davis campus of the University of California, to be converted into a more modern machine.
Subject(s): Equipment and supplies
Cyclotrons
Particle accelerators
Laboratories
Berkeley (Calif.)
Cooksey, Donald, 1892-1977
Green, G. Kenneth
Date Created: August 1939
Credit Line: Lawrence Berkeley National Laboratory, courtesy AIP Emilio Segrè Visual Archives, Fermi Film Collection
Catalog ID: Cooksey Donald F1
Title: Donald Cooksey and G. K. Green view the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley.
Type of Resource: still image
Date Created: August 1939
Extent: 2 photographic print (black and white; 10 x 6.75 inches)
Abstract/Description: (L-R): Donald Cooksey and G. K. Green view the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley. The machine was the most powerful atom-smasher in the world at the time. It had started operating early in the year. During the period of the photograph Dr. Edwin M. McMillan was doing the work which led a year later to the discovery of neptunium (element 93) a year later. The instrument was used later by Dr. Glenn T. Seaborg and his colleagues for the discovery of element 94 (plutonium) early in 1941. Subsequently, other transuranium elements were discovered with the machine, as well as many radioisotopes, including carbon-14. For their work, Drs. Seaborg and McMillan shared the Nobel Prize in 1951. The machine was used for the "long bombardments" which produced the first weighable and visible quantities of plutonium, which was used at Chicago by Seaborg and his colleagues to work out the method for separating plutonium on an industrial scale at the Hanford, Washington, plutonium production plant. The historic instrument was dismantled at the end of June, 1962, and the magnet sent to the Davis campus of the University of California, to be converted into a more modern machine.
Identifier(s): Cooksey Donald F1 (Catalog ID)
Note(s):

Credit Line: Lawrence Berkeley National Laboratory, courtesy AIP Emilio Segrè Visual Archives, Fermi Film Collection
Subject(s): Equipment and supplies
Cyclotrons
Particle accelerators
Laboratories
Berkeley (Calif.)
Cooksey, Donald, 1892-1977
Green, G. Kenneth
Held by: Niels Bohr Library & Archives
Copyright Holder: Lawrence Berkeley National Laboratory
Restrictions on Access: NBLA may be able to provide copyright contact information. Please contact us.
Related Title: Fermi Film Collection.
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