Szilard, Leo

SUBJECT AREA: Weapons and armour
[br]
b. 11 February 1898 Budapest, Hungary
d. 30 May 1964 La Jolla, California, USA
[br]
Hungarian (naturalized American in 1943) nuclear-and biophysicist.
[br]
The son of an engineer, Szilard, after service in the Austro-Hungarian army during the First World War, studied electrical engineering at the University of Berlin. Obtaining his doctorate there in 1922, he joined the faculty and concentrated his studies on thermodynamics. He later began to develop an interest in nuclear physics, and in 1933, shortly after Hitler came to power, Szilard emigrated to Britain because of his Jewish heritage.
In 1934 he conceived the idea of a nuclear chain reaction through the breakdown of beryllium into helium and took out a British patent on it, but later realized that this process would not work. In 1937 he moved to the USA and continued his research at the University of Columbia, and the following year Hahn and Meitner discovered nuclear fission with uranium; this gave Szilard the breakthrough he needed. In 1939 he realized that a nuclear chain reaction could be produced through nuclear fission and that a weapon with many times the destructive power of the conventional high-explosive bomb could be produced. Only too aware of the progress being made by German nuclear scientists, he believed that it was essential that the USA should create an atomic bomb before Hitler. Consequently he drafted a letter to President Roosevelt that summer and, with two fellow Hungarian émigrés, persuaded Albert Einstein to sign it. The result was the setting up of the Uranium Committee.
It was not, however, until December 1941 that active steps began to be taken to produce such a weapon and it was a further nine months before the project was properly co-ordinated under the umbrella of the Manhattan Project. In the meantime, Szilard moved to join Enrico Fermi at the University of Chicago and it was here, at the end of 1942, in a squash court under the football stadium, that they successfully developed the world's first self-sustaining nuclear reactor. Szilard, who became an American citizen in 1943, continued to work on the Manhattan Project. In 1945, however, when the Western Allies began to believe that only the atomic bomb could bring the war against Japan to an end, Szilard and a number of other Manhattan Project scientists objected that it would be immoral to use it against populated targets.
Although he would continue to campaign against nuclear warfare for the rest of his life, Szilard now abandoned nuclear research. In 1946 he became Professor of Biophysics at the University of Chicago and devoted himself to experimental work on bacterial mutations and biochemical mechanisms, as well as theoretical research on ageing and memory.
[br]
Principal Honours and Distinctions
Atoms for Peace award 1959.
Further Reading
Kosta Tsipis, 1985, Understanding Nuclear Weapons, London: Wildwood House, pp. 16–19, 26, 28, 32 (a brief account of his work on the atomic bomb).
A collection of his correspondence and memories was brought out by Spencer Weart and Gertrud W.Szilard in 1978.
CM

Biographical history of technology. - Taylor & Francis e-Librar. . 2005.

Look at other dictionaries:

  • SZILARD, LEO — (1898–1964), Hungarian physicist and extraordinary polymath. He was born in Budapest and studied at the Minta School and at Budapest Technical University (1916–19). His engineering course was disrupted by World War I service in the Austro… …   Encyclopedia of Judaism

  • Szilard , Leo — (1898–1964) Hungarian–American physicist Szilard, the son of an architect, studied engineering in his native city of Budapest before moving to the University of Berlin where he began the study of physics and obtained his doctorate in 1922. He… …   Scientists

  • Szilard, Leo — born Feb. 11, 1898, Budapest, Hung., Austria Hungary died May 30, 1964, La Jolla, Calif., U.S. Hungarian born U.S. physicist. He taught at the University of Berlin (1922–33), then fled to England (1934–37) and the U.S., where he worked at the… …   Universalium

  • Szilard,Leo — Szi·lard (zĭlʹərd, zə lärdʹ), Leo. 1898 1964. Hungarian born American physicist and biologist. A member of the Manhattan Engineering Project, he helped develop the first atomic bomb. Szilard was later opposed to the construction and use of all… …   Universalium

  • Szilard, Leo — (1898 1964)    American physicist of Hungarian origin. He studied at the University of Berlin. With the rise of Nazism, he went to England and worked at Oxford University. He then went to the US. From 1960 he was professor at the Enrico Fermi… …   Dictionary of Jewish Biography

  • Szilard, Leo — (11 feb. 1898, Budapest, Hungría, Austria Hungría–30 may. 1964, La Jolla, Cal., EE.UU.). Físico estadounidense nacido en Hungría. Enseñó en la Universidad de Berlín (1922–33), luego huyó a Inglaterra (1934–37) y a EE.UU., donde trabajó en la… …   Enciclopedia Universal

  • Szilard, Leo —  (1898–1964) Hungarian born American physicist …   Bryson’s dictionary for writers and editors

  • Leo Szilard — Leó Szilárd 1916 im Alter von 18 Jahren Leó Szilárd (* 11. Februar 1898 in Budapest; † 30. Mai 1964 in La Jolla, Kalifornien) war ein ungarisch deutsch amerikanischer Physiker und …   Deutsch Wikipedia

  • Leó Szilárd — (11 de febrero de 1898 30 de mayo de 1964) fue un físico judío húngaro estadounidense que trabajó en el Proyecto Manhattan. Nació en Budapest y murió en La Jolla, California …   Wikipedia Español

  • Leo Szilard — Leó Szilárd Leó Szilárd en 1916 Leó Szilárd (11 février 1898 à Budapest– 30 mai 1964 à La Jolla en Californie) était un physicien hungaro américain. Parmi les premiers à envisager les applications miltaires de l énergie… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.