Charge polarization calculated with a microscopic model for the fission fragments of U-236

¹ Department of Physics, Graduate School of Science and Engineering, Saitama University, 338-8570 Saitama, Japan
² NAPC - Nuclear Data Section, International Atomic Energy Agency, A-1400 Vienna, Austria
³ Laboratory for Zero-Carbon Energy, Tokyo Institute of Technology, 152-8550 Tokyo, Japan

^* e-mail: ebata@mail.saitama-u.ac.jp

Published online: 26 May 2023

Abstract

We investigated theoretical methods to estimate the charge polarization of the fission fragments. The method is based on the microscopic mean-field model with the nucleon degree of freedom, and is represented in the three-dimensional coordinate space for dealing with any nuclear deformation. We employed the Skyrme effective interaction for the calculations and uranium-236 as a target nucleus. We reported static and dynamic methods in which the potential energy surface of the fissioning nucleus concerning the quadrupole and octupole deformations are used. Although the static method deduced the charge polarization which indicates the nuclei with the magic number and the octupole deformation, the quantities are not consistent with the existing data library (Wahl’s systematics). The dynamic method with the iso-energy initial condition on the potential energy surface showed the finite charge polarization of light and heavy fission fragments which is consistent with the data library. Furthermore, it indicates that the charge polarization has energy dependence of the initial states of the dynamic method.