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The discovery of the neutron by James Chadwick in 1932, [1] followed by that of nuclear fission in uranium by the German chemists Otto Hahn and Fritz Strassmann in 1938, [2] and its theoretical explanation (and naming) by Lise Meitner and Otto Robert Frisch soon after, [3] opened up the possibility of a nuclear chain reaction with uranium. [1]
1939 – September 1 – World War II begins after the invasion and subsequent partition of Poland between Nazi Germany and the Soviet Union. 1939 – October – U.S. President Franklin D. Roosevelt receives the Einstein–Szilárd letter and authorizes the creation of the Advisory Committee on Uranium.
The Manhattan Project was a research and development project that produced the first atomic bombs during World War II. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the US Army Corps of Engineers. The Army component of ...
France had been heavily involved in nuclear research before World War II through the work of the Joliot-Curies. This was discontinued after the war because of the instability of the Fourth Republic and lack of finances. [76] However, in the 1950s, France launched a civil nuclear research program, which produced plutonium as a byproduct.
The Frisch–Peierls memorandum was the first technical exposition of a practical nuclear weapon. It was written by expatriate German-Jewish physicists Otto Frisch and Rudolf Peierls in March 1940 while they were both working for Mark Oliphant at the University of Birmingham in Britain during World War II.
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1: The Germans begin a surprise offensive (Operation Nordwind) in northern Alsace.: Unternehmen Bodenplatte (Operation Baseplate) is launched by the Luftwaffe against western Allied air bases in Belgium and Holland by elements of ten different Jagdgeschwadern (fighter wings), as its last major air offensive of the war in the West.
Nuclear warfare, also known as atomic warfare, is a military conflict or prepared political strategy that deploys nuclear weaponry. Nuclear weapons are weapons of mass destruction; in contrast to conventional warfare, nuclear warfare can produce destruction in a much shorter time and can have a long-lasting radiological result.