Validity analysis of γ -ray strength function models for radiative capture reactions of heavy nuclei

Abstract

Accurate simulation of radiative capture reactions (RCRs) requires precise modeling of γ-ray strength functions (GSF). Various GSF models exist but need normalization based on experimental total radiative width (TRW) data. This study found that current normalization methods fail for neutron-induced RCRs in 238U and 233Th nuclei. In this regard, re-normalization values are proposed in order to improve model consistency at low energies. The standard Lorentzian (SLO) model fits experimental data best with minimal normalization. © 2024 World Scientific Publishing Company.