Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Collins Timothy F1

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Collins Timothy F1

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Image title: 
Collins and White Operating Spectrometer
Credit line: 
National Archives and Records Administration (NARA), courtesy AIP Emilio Segrè Visual Archives

Timothy Collins (left) and F.A. White (right) operating a double magnet mass spectrometer used in discovering a new, naturally-occurring, radioactive isotope of tantalum, called Tantalum-180. The discovery of Tantalum-180 provided additional information important to the overall understanding of nuclear structure. The spectrometer, designed by F.A. White, is so sensitive that it achieves complete separation of isotopes even when one type may be more than a million times more plentiful than its neighbor.

Original format: 
1 photographic print (black and white; 7 x 9.5 inches)
Collins, Timother Leo
White, Frederick Andrew, 1918-