Otto Hahn (1879 - 1968)
Otto Hahn was born in Germany. In 1938, with Fritz Strassmann, Hahn discovered that barium could be produced by bombarding uranium with neutrons. This discovery, brought about by the process of fission, earned Hahn the Nobel Prize in Chemistry in 1944, and led directly to the development of the atomic bomb.
He served as the director of the Kaiser Wilhelm Institute from 1928 - 1945. Hahn died on July 28, 1968.