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Cross sections for neutron capture in the range of unresolved resonances arepredicted simultaneously to level distances at the neutron threshold for morethan 100 spin-0 target nuclei with A >70. Assuming triaxiality in nearly allthese nuclei a combined parameterization for both, level density and photonstrength is presented. The strength functions used are based on a global fit toIVGDR shapes by the sum of three Lorentzians adding up to the TRK sum rule andtheory-based predictions for the A-dependence of pole energies and spreadingwidths. For the small spins reached by capture level densities are welldescribed by only one free global parameter; a significant collectiveenhancement due to the deviation from axial symmetry is observed. Reliablepredictions for compound nuclear reactions also outside the valley of stabilityas expected from the derived global parameterization are important for nuclearastrophysics and for the transmutation of nuclear waste.

Importance of nuclear triaxiality for electromagnetic strength, level density and neutron capture cross sections in heavy nuclei