Verification of Models for Calculation of E1 Radiative Strength

Details Verification of Models for Calculation of E1 Radiative Strength Verification of Models for Calculation of E1 Radiative Strength

2008-02-15

arxiv.org/abs/0802.2183v1

PoSPSF07:002,2007

Physics

Nuclear Physics

Nuclear Theory

33 pages; 5 figures, 3 tables. Talk given at Workshop on Photon Strength Functions, Prague, Czech Republic, June 17-20, 2007

Scientific paper

Photoabsorption cross sections and gamma-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 gamma -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.

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