Abstract
Existence of two kinds of scission configurations associated with the symmetric and asymmetric fission modes is pointed out in the fission of actinides: elongated and compact configurations. Each symmetric and asymmetric scission property is discussed in terms of shape elongation evaluated from fragment total kinetic energy (TKE). It is found that the shape elongation associated with the asymmetric fission mode is nearly constant for a wide range of fissioning nuclei, while that with the symmetric one is also constant except for low-energy induced fission and spontaneous fission (SF) of heavy nuclei. Prom the systematic study of the scission properties, the bimodal fission observed in SF of the heavy actinides is interpreted as the presence of the two fission paths of the ordinary asymmetric mode and a strongly shell-influenced symmetric one.
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Nagame, Y., Zhao, Y.L., Nishinaka, I. et al. Symmetric and asymmetric scission properties. APH N.S., Heavy Ion Physics 13, 121–131 (2001). https://doi.org/10.1556/APH.13.2001.1-3.13
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DOI: https://doi.org/10.1556/APH.13.2001.1-3.13