Physicists Proved Controlled Nuclear Chain Fission Was Possible, 75 Years Ago
By Artemis Spyrou, Michigan State University and Wolfgang Mittig, Michigan State University | December 2, 2017 09:36am ET
Over Christmas vacation in 1938, physicists Lise Meitner and Otto Frisch received puzzling scientific news in a private letter from nuclear chemist Otto Hahn. When bombarding uranium with neutrons, Hahn had made some surprising observations that went against everything known at the time about the dense cores of atoms – their nuclei.
https://www.livescience.com/61082-nuclear-chain-reaction-anniversary.html
