Our projected DFT approach can be used to predict isospin mixing in heavy nuclei. The calculated ISB corrections and -values in nuclei are listed in Table 4. The values of are also shown in Fig. 12. Note that the predicted ISB corrections are here considerably smaller than those in =70 and =74 nuclei, see Tables 2 and 3. For the sake of comparison, Fig. 12 also shows predictions of Ref.  for the Nb Zr transition using the VAMPIR approach with either charge-independent Bonn A potential or charge-dependent Bonn CD potential. Note that our prediction is only slightly below the Bonn A result and significantly lower than the Bonn CD value. For the sake of completeness, it should be mentioned that our -value of 10.379MeV for this transition agrees well with MeV (Bonn A) and 10.291MeV (Bonn CD) calculated within the VAMPIR approach.
Our calculated values of are in heavy nuclei considerably smaller than those obtained from a perturbative expression [11,48,5]: