Hahn, Otto (1879–1968)
German chemist awarded the 1944 Nobel Prize in Chemistry for his work on
nuclear fission. With Lise Meitner
he discovered the new element protactinium;
later they bombarded uranium with neutrons,
treating the uranium with ordinary barium.
Meitner showed that the residue was radioactive barium formed from the splitting
(fission) of the uranium nucleus. The element hahnium
is name after him.