Verification of models for calculation of E1 radiative strength function

Abstract

Photoabsorption cross sections and γ-decay strength function are calculated and compared with experimental data to test the existing models of dipole radiative strength functions (RSF) for the middle-weight and heavy atomic nuclei. Simplified version of the modified Lorentzian model are proposed. New tables of giant dipole resonance (GDR) parameters are given. It is shown that the phenomenological closed-form models with asymmetric shape can be used for overall estimates of the dipole RSF in the γ-ray energy region up to about 20 MeV when GDR parameters are known or the GDR systematics can be adopted. Otherwise, the HFB-QRPA microscopic model and the semi-classical approach with moving surface appear to be more adequate methods to estimate the dipole photoabsorption RSF. Workshop on Photon Strength Functions and Related Topics

Reference database for photon strength functions

“…More details on the model and the adjustment can be found in Refs. [106,143,146,195]. The prescription for calculating the high-energy quasi-deuteron contribution, i.e., the photoabsorption cross section leading to the production of a neutron -proton pair can be found in Ref.…”

Investigate Cross-sections for (α, γ) reactions on p-nuclei 90Zr, 121Sb, 151Eu, and 162Er using Different Models of Radiative Strength Functions

“…In this work, we examined the effect of various RSF models on the cross sections for target nuclei at astrophysically relevant energies, which consisted of 90 Zr, 121 Sb, 151 Eu, and 162 Er. The RSF models under evaluation are the microscopic HFB-QRPA model based on the BSk-14 Skyrme force [16], the HF-BCS theory using Skyrme parameters [17], the EGLO model [18], SMLO model [19], the empirical SMLO (SMLOg) and global semi-microscopic (D1M-QRPAg) models. The last two models for electric and magnetic dipole RSF have recently been developed [20,21], which theoretical calculations were compared to all experiments.…”