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August 14

Arthur Jeffrey Dempster

Arthur Jeffrey Dempster was born on August 14, 1886. See ranking, bio blurb, and everyone else born that day.

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About Arthur Jeffrey Dempster

Arthur Jeffrey Dempster (August 14, 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.

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