Arthur Jeffrey Dempster
Canadian-American physicist
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. Wikipedia
Born: August 14, 1886, Toronto, Canada
Died: March 11, 1950 (age 63 years), Stuart, FL
Award: Newcomb Cleveland Prize (1929)
Partner: Germaine Dempster (1926–) and Germaine Dempster