Investigation of Fission Modes of 248Cf and 254,256 Fm Nuclei Produced in Heavy-Ion Reactions
Ostroukhov A.A. Kozulin E.M. Burtebayev N.T. Bogachev A.A. Gikal K.B. Itkis I.M. Knyazheva G.N. Kvochkina T.N. Mukhamejanov Y.S. Novikov K.V. Pan A.N.
December 2022Pleiades Publishing
Physics of Atomic Nuclei
2022#85Issue 6748 - 755 pp.
Abstract: The role of closed and deformed proton and neutron shells in the fission of 248Cf and 254,256Fm nuclei at excitation energies from 40 to 56 MeV is studied. The mass–energy distributions of fission fragments of these nuclei formed in the 16O + 232Th and 16,18O, + 238U 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 Z ∼ 38 deformed proton shell. A manifestation of a supershort mode is found in the fission of 256Fm at the compound-nucleus excitation energy of 40 MeV.
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Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russian Federation
Laboratory of Fission Physics, Institute of Nuclear Physics, Almaty, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan
Flerov Laboratory of Nuclear Reactions
Laboratory of Fission Physics
Al-Farabi Kazakh National University
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