학술논문
Investigation of Fission Modes of Cf and Fm Nuclei Produced in Heavy-Ion Reactions.
Document Type
Article
Author
Source
Subject
*NEUTRONS
*PROTONS
*COULOMB barriers (Nuclear fusion)
*SPECTROMETERS
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*
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Language
ISSN
1063-7788
Abstract
The role of closed and deformed proton and neutron shells in the fission of Cf and Fm nuclei at excitation energies from 40 to 56 MeV is studied. The mass–energy distributions of fission fragments of these nuclei formed in the Th and U reactions at projectile-ion energies close to the Coulomb barrier are measured by means of the CORSET time-of-flight spectrometer. It is shown that, in all of the reactions under study, an enhanced yield of fragments in the mass region around 100 a.m.u. is due to the effect of the deformed proton shell. A manifestation of a supershort mode is found in the fission of Fm at the compound-nucleus excitation energy of 40 MeV. [ABSTRACT FROM AUTHOR]