Atomic Heritage Foundation

December 21, 1938

December 21, 1938

Otto Hahn submits a paper to Naturwissenschaften conclusively showing the production of radioactive barium from neutron irradiated uranium.

Date Range:

1938CE Dec 21st

Era:

1938 to 1939: Discovering Fission

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Albert Einstein receiving his his certificate of U.S. citizenship in 1940 from Judge Philip Forman. Photo courtesy Al Aumuller/Library of Congress.

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