Speaker
Description
The charge distribution of fission fragments is a significant quantity to estimate and evaluate the neutron emission yields from fission fragments. The distribution has been evaluated as the deviation from the unchanged charge distribution (UCD) assumption in which the fragments keep the neutron-proton ratio of the fissile parent nucleus. The deviation is called the charge polarization (CP).
For the major fission reactions in the nuclear reactor, their CP have been compiled in a library called Wahl's systematics. Although the library is designed for the nuclear engineering field, this is not suitable to predict the fission fragments from unmeasured fissile nuclei.
In order to provide the CP of fragments generated from unknown fissile nuclei without empirical ways, we suggest a new method based on the microscopic nuclear theory. We employ the mean-field theories, which are the constrained Skyrme Hartree-Fock+BCS theory and the canonical-basis time-dependent Hartree-Fock-Bogoliubov theory, represented in three-dimensional space.
In the presentation, we will report the calculated CP of the fission products on the $^{236}$U, assuming the reaction of $^{235}$U absorbed a thermal neutron. We will discuss the effectiveness of our method and will mention the dynamical effects on the CP through the comparison among results calculated by static, dynamic mean-field models and the data in Wahl's systematics.