Arthur Jeffrey Dempster
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Arthur Jeffrey Dempster was a Canadian-American physicist best known for his work in mass spectrometry and his discovery in 1935 of the uranium isotope 235U. As part of his research, he investigated t
Dempster, c. 1925-30
Uranium-235
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Uranium-235 is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction. It is the only
Arthur Jeffrey Dempster
…1886 – March 11, 1950) was a Canadian-American physicist best known for his work in mass spectrometry and his discovery in 1935 of the uranium isotope 235U. As part of his research, he investigated the isotopic constitution of multiple other elements. Dempster was born in Toronto, Ontario, Canada. He…
Uranium metal highly enriched in uranium-235