Kinetic energy of fission fragments within a dynamical model
Phys. Rev. C 112, 014608 – Published 2 July, 2025
DOI: https://doi.org/10.1103/8smy-1ls9
Abstract
The kinetic energy of individual fission fragments for actinide nuclei is, for example, important for evaluating the prompt-neutron spectrum in the laboratory system. It is experimentally known that the kinetic energy for each fragment is constant at about for light fragments and that for heavy fragments decreases linearly with mass number. Most of the theoretical studies carried out so far attempted to calculate the total kinetic energy of both fragments, i.e., the sum of the energies of two fragments, but the kinetic energy of each fragment was not analyzed in detail as far as we recognize. We have calculated them in thermal-neutron-induced fission of with a dynamical model using Langevin equations within a three-dimensional two-center parametrization. Also fission of was investigated. It is calculated from the Coulomb energy at the scission point and the prescission kinetic energy. It is found that the prescission kinetic energy has about 2–4 % contribution in the kinetic energy. The calculated results reproduce the trend of the experimental data.
