Description of dipole strength in heavy nuclei in conformity with their quadrupole degrees of freedom
Helmholtz Zentrum Dresden-Rossendorf (HZDR), Germany
2 Technische Universität Dresden, Germany
In conformity to new findings about the widespread occurrence of triaxiality arguments are given in favor of a description of the giant dipole resonance in heavy nuclei by the sum of three Lorentzians. This TLO parameterization allows a strict use of resonance widths Γ in accordance to the theoretically founded power law relation to the resonance energy. No additional variation of Γ with the photon energy and no violation of the sum rule are necessary to obtain a good agreement to nuclear photo-effect, photon scattering and radiative capture data. Photon strength other than E1 has a small effect, but the influence of the level density on photon emission probabilities needs further investigation.
© Owned by the authors, published by EDP Sciences, 2012