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A recent theoretical prediction of a breaking of axial symmetry in quasi allheavy nuclei is confronted to a new critical analysis of photon strengthfunctions of nuclei in the valley of stability. For the photon strength in theisovector giant dipole resonance (IVGDR) regime a parameterization of GDRshapes by the sum of three Lorentzians (TLO) is extrapolated to energies belowand above the IVGDR. The impact of non-GDR modes adding to the low energy slopeof photon strength is discussed including recent data on photon scattering andother radiative processes. These are shown to be concentrated in energy regionswhere various model calculations predict intermediate collective strength; thusthey are obviously separate from the IVGDR tail. The triple Lorentzian (TLO)ansatz for giant dipole resonances is normalized in accordance to the dipolesum rule. The nuclear droplet model with surface dissipation accounts well forpositions and widths without local, nuclide specific, parameters. Very few andonly global parameters are needed when a breaking of axial symmetry already inthe valley of stability is admitted and hence a reliable prediction forelectric dipole strength functions also outside of it is expected.

Breaking of axial symmetry in excited heavy nuclei as identified in Giant Dipole Resonance data