Fission barriers for even-even superheavy nuclei

A quantitative model for the evaluation of the heights of static fission barriers is formulated within the framework of the macroscopic-microscopic approach. In order to describe the main properties (at the ground state and at the saddle point) of superheavy nuclei, a high-dimensional deformation space is used. In the present paper we systematically calculate fission barrier heights B-f for even-even heavy and superheavy nuclei in the range of proton numbers 92 <= Z <= 126 and neutron numbers 134 <= N <= 192. Comparisons with experimental data and different theoretical calculations are also shown. The dependence on B-f of fully incorporated, nonaxiality, and reflection-asymmetric degrees of freedom is discussed.