Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-03-10
Int.J.Mod.Phys.E17:323-349,2008
Physics
Nuclear Physics
Nuclear Theory
25 pages, 12 figures, accepted for publication in IJMPE
Scientific paper
10.1142/S0218301308009045
Ternary fission probabilities for thermal neutron induced fission of plutonium are analyzed within the framework of an evaporation-based model where the complexity of time-varying potentials, associated with the neck collapse, are included in a simplistic fashion. If the nuclear temperature at scission and the fission-neck-collapse time are assumed to be ~1.2 MeV and ~10^-22 s, respectively, then calculated relative probabilities of ternary-fission light-charged-particle emission follow the trends seen in the experimental data. The ability of this model to reproduce ternary fission probabilities spanning seven orders of magnitude for a wide range of light-particle charges and masses implies that ternary fission is caused by the coupling of an evaporation-like process with the rapid re-arrangement of the nuclear fluid following scission.
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