\begin{document}$ \epsilon $\end{document} and mass asymmetry η at the scission point, indicating that \begin{document}$ \epsilon $\end{document} has no evident impact on the fragment mass distribution. The elongation \begin{document}$ Z_0/R_0 $\end{document} and its correlation with the mass asymmetry η at the scission point are clearly influenced by the neck parameter \begin{document}$ \epsilon $\end{document}, which has a strong effect on the total kinetic energy (TKE) distribution of the fragments. The pre-neutron emission fragment mass distributions for 14 MeV n+ \begin{document}$ ^{233,235,238} $\end{document}U and \begin{document}$ ^{239} $\end{document}Pu are calculated, and then, based on these results, the post-neutron emission fragment mass distributions are obtained by using the experimental data of prompt neutron emission. The calculated post-neutron emission fragment mass distributions can reproduce the experimental data well. The TKE distributions for 14 MeV n+ \begin{document}$ ^{235} $\end{document}U fission are calculated for \begin{document}$ \epsilon $\end{document}=0.25, 0.35, and 0.45, and the results show that the TKE distribution cannot be described very well for the three cases. However, the trend of the calculated TKE distribution with \begin{document}$ \epsilon $\end{document} is just as expected from the scission configuration calculations. The results with \begin{document}$ \epsilon $\end{document}=0.35 present a better agreement with the experiment data compared with the other two cases."> Influence of the neck parameter on the fission dynamics within the two-center shell model parametrization -
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