Using one of Lawrence's advanced cyclotrons, John Livingood, Fred Fairbrother, and Seaborg created a new isotope of iron, iron-59 in 1937.
Empregando un dos ciclotróns do seu profesor Lawrence, John Livingood, Fred Fairbrother e Seaborg crearon un novo isótopo do ferro, o ferro 59 (Fe-59) en 1937.