Driving Potential and Fission-Fragment Charge Distributions

TL;DR

This paper introduces a rapid method to predict fission-fragment charge yields in actinides using the driving potential derived from energy-density functionals, accurately reproducing experimental distributions.

Contribution

It presents a novel, efficient approach to calculate fission-fragment charge distributions based on the driving potential, incorporating nuclear deformations and pairing effects.

Findings

Accurately reproduces charge distributions for various actinide fissions.

Highlights importance of nuclear deformations and pairing corrections.

Provides a quick computational method for fission yield predictions.

Abstract

We propose an efficient approach to describe the fission-fragment charge yields for actinides based on the driving potential of fissioning system. Considering the properties of primary fission fragments at their ground states, the driving potential, which represents the potential energies of the system around scission configuration and closely relates to the yields of fragments, can be unambiguously and quickly obtained from the Skyrme energy-density functional together with the Weizsaecker-Skyrme mass model. The fission-fragment charge distributions for thermal-neutroninduced fission and spontaneous fission of a series of actinides, especially the odd-even staggering in charge distributions can be well reproduced. Nuclear dynamical deformations and pairing corrections of fragments play an important role in the charge distributions.