1764 K
36 pp.
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TitleSpontaneous Fission
Author(s)Segre, Emilio
Publication DateNovember 22, 1950
Report NumberUCRL--1021
Unique IdentifierACC0410
Other NumbersOSTI ID: 910247
Research OrgRadiation Laboratory, University of California [Ernest Orlando Lawrence Berkeley National Laboratory (LBNL)], Berkeley, CA (US)
Contract NoW-7405-eng-48
Sponsoring OrgU. S. Atomic Energy Commission (AEC)
Subject72 Physics of Elementary Particles and Fields; Decay; Fission; Neutrons; Potentials; Spontaneous Fission; Uranium
KeywordsPhysics and Mathematics
Related Web PagesEmilio Segre, the Antiproton, Technetium, and Astatine
AbstractThe first attempt to discover spontaneous fission in uranium was made by [Willard] Libby, who, however, failed to detect it on account of the smallness of effect. In 1940, [K. A.] Petrzhak and [G. N.] Flerov, using more sensitive methods, discovered spontaneous fission in uranium and gave some rough estimates of the spontaneous fission decay constant of this substance. Subsequently, extensive experimental work on the subject has been performed by several investigators and will be quoted in the various sections. [N.] Bohr and [A.] Wheeler have given a theory of the effect based on the usual ideas of penetration of potential barriers. On this project spontaneous fission has been studied for the past several years in an effort to obtain a complete picture of the phenomenon. For this purpose the spontaneous fission decay constants {lambda} have been measured for separated isotopes of the heavy elements wherever possible. Moreover, the number {nu} of neutrons emitted per fission has been measured wherever feasible, and other characteristics of the spontaneous fission process have been studied. This report summarizes the spontaneous fission work done at Los Alamos up to January 1, 1945. A chronological record of the work is contained in the Los Alamos monthly reports.
1764 K
36 pp.
View Document 

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