Dempster Mass Spectrometer
date: label: Date made
content: 1933-1935
name: label: maker
content: Dempster, A.J.
notes: label: Description
content: Arthur Jeffrey Dempster (1886–1950) was a Canadian-American physicist who earned a PhD from the University of Chicago and then served on the faculty. Using this mass spectrometer, Dempster discovered 33 naturally occurring isotopes in 17 elements. One of these, found in the mid-1930s, was 235U, the uranium isotope that would become an essential element of the atomic bomb.
label: Description
content: Ref: Arthur J. Dempster, “Thirty Years of Mass Spectroscopy,” The Scientific Monthly 67 (Sept. 1948): 145-153.
label: Description
content: “DR. A. J. DEMPSTER, PHYSICIST, 63, DEAD,” New York Times (March 12, 1950), p. 94.
label: Description
content: Samuel K. Allison, "Arthur Jeffrey Dempster 1886–1950," National Academy of Sciences (1952).
place: label: Associated Place
content: United Kingdom: England, Cambridge
setName: label: See more items in
content: Medicine and Science: Modern Physics
creditLine: label: Credit Line
content: The University of Chicago
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.N-08041
label: catalog number
content: N-08041
label: accession number
content: 235318
objectType: label: Object Name
content: Mass Spectrometer, Dempster