Fission Decay Widths for Heavy-Ion Fusion-Fission Reactions

Details Fission Decay Widths for Heavy-Ion Fusion-Fission Reactions Fission Decay Widths for Heavy-Ion Fusion-Fission Reactions

2008-01-30

arxiv.org/abs/0801.4730v2

Phys.Rev.Lett.101:032702,2008

Physics

Nuclear Physics

Nuclear Theory

14 pg, 6 fig, submitted to Physical Review

Scientific paper

10.1103/PhysRevLett.101.032702

Cross-section and neutron-emission data from heavy-ion fusion-fission reactions are consistent with a Kramers-modified statistical model which takes into account the collective motion of the system about the ground state; the temperature dependence of the location of fission transition points; and the orientation degree of freedom. We see no evidence to suggest that the nuclear viscosity departs from the surface-plus-window dissipation model. The strong increase in the nuclear viscosity above a temperature of ~1 MeV deduced by others is an artifact generated by an inadequate fission model.

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