jan 1, 1938 - 1938
December - Fermi receives the Nobel Prize in Physics for the discovery of transuranic elements (actually fission of uranium) and departs for the United States.
December 22 - Otto Hahn sends a paper to Lise Meitner containing experimental results that are interpreted by Meitner and nephew Otto Frisch as nuclear fission.
Added to timeline:
atomic and nuclear physics