Characteristics of two fission modes

Y. Nagame, Y. L. Zhao, I. Nishinaka, S. Goto, D. Kaji, M. Tanikawa, K. Tsukada, M. Asai, H. Haba, M. Sakama, S. Ichikawa, K. Sueki, H. Kudo, H. Nakahara

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Characteristics of nuclear deformation properties at scission of two fission modes, symmetric and asymmetric, are reviewed. Existence of two kinds of scission configurations associated with the symmetric and asymmetric fission modes is pointed out: elongated and compact configurations. Each symmetric and asymmetric scission property is discussed in terms of shape elongation evaluated from fragment total kinetic energy (TKE). Fragment deformation at scission is also discussed based on neutron multiplicity data. From the systematic study of the scission properties in a wide range of actinide fission, the bimodal fission observed in spontaneous fission (SF) of the heavy actinides is interpreted as the result of the presence of the two fission paths of the ordinary asymmetric mode and a strongly shell-influenced symmetric one. The correlation between the fragment shell structures and the asymmetric mass-yield curves is described.

Original languageEnglish (US)
Pages (from-to)681-688
Number of pages8
JournalRadiochimica Acta
Issue number11-12
StatePublished - 2001


  • Asymmetric fission
  • Asymmetric mass yield curve
  • Fragment deformation Bimodal fission
  • Scission configurations
  • Symmetric fission
  • Two mode fission

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Nuclear Energy and Engineering


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