Image: Berkeley 60-inch cyclotron
Description: Photograph shows the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley, in August, 1939. 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 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 pro...
Title: Berkeley 60-inch cyclotron
Credit: This media is available in the holdings of the National Archives and Records Administration, cataloged under the National Archives Identifier (NAID) 558594. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information. English | Español | Français | Italiano | Македонски | മലയാളം | Nederlands | Polski | Português | Русский | Slovenščina | Türkçe | Українська | Tiếng Việt | 中文（简体） | 中文（繁體） | +/−
Author: Department of Energy. Office of Public Affairs
Permission: This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. Please note that national laboratories operate under varying licences and some are not free. Check the site policies of any national lab before crediting it with this tag. English | français | македонски | മലയാളം | Nederlands | українська | 中文（繁體） | 中文（简体） | +/−
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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