Aston, Frederick

Aston Frederick W., Baxter, G. P., Brauner, B., Debieme, A., Leduc, A., Richards, Soddy, T. W. F., Urbain, G. 1923. "Report of the International Committee on the Elements." Journal of the American Chemical Society 45 867-874. 

The cathode-ray tubes were also found to eject positive ions in the opposite direction from the electrons. These canal rays were comprised of much more massive particles. J.J. Thomson (1906 Nobel Prize in Physics) used a magnetic field to bend the paths of these ions and record their collisions on film. He discovered that pure neon gas produced two masses, 20 and 22, due to isotopes. The term was coined by Frederick Soddy (1921 Nobel Prize in Chemistry) during his studies of radioactive elements having the same chemical but different radioactive properties. The separation of positive ions using a magnetic field followed by recording them on a photographic plate is the basis of mass spectrometry, developed by Francis W. Aston (1922 Nobel Prize in Chemistry). ... 

Paul Berg, Walter Gilbert, Frederick Sanger 1922 Francis W. Aston... 

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