Chikako Ishizuka

Analysis of the total kinetic energy of fission fragments with the Langevin equation

We analyzed the total kinetic energy (TKE) of fission fragments with three-dimensional Langevin calculations for a series of actinides and Fm isotopes at various excitation energies. This allowed us to establish systematic trends of TKE with

Four-dimensional Langevin approach to low-energy nuclear fission of

Z^2/A^{1/3}

^{236}

of the fissioning system and as a function of excitation energy. In the mass-energy distributions of fission fragments we see the contributions from the standard, super-long, and super-short (in the case of

U

^{258}

Effects of microscopic transport coefficients on fission observables calculated by the Langevin equation

Fm) fission modes. For the fission fragments mass distribution of

Dynamical approach to isotopic-distribution of fission fragments from actinide nuclei

^{258}

Temperature dependence of shell corrections

Fm we obtained a single peak mass distribution. The decomposition of TKE into the prescission kinetic energy and Coulomb repulsion showed that decrease of TKE with growing excitation energy is accompanied by a decrease of prescission kinetic energy. It was also found that transport coefficients (friction and inertia tensors) calculated by a microscopic model and by macroscopic models give drastically different behavior of TKE as a function of excitation energy. The results obtained with microscopic transport coefficients are much closer to experimental data than those calculated with macroscopic ones.

Fission observables from 4D Langevin calculations with macroscopic transport coefficients

We developed a four-dimensional (4D) Langevin model, which can treat the deformation of each fragment independently and applied it to low-energy fission of

The 4-dimensional Langevin approach to low energy nuclear fission

^{236}mathrm{U}

Dynamical Approach to Low-Energy Nuclear Fission in Terms of Langevin Equation

, the compound system of the reaction