Microscopic calculations of isospin mixing in N ≈ Z nuclei and isospin-symmetry-breaking corrections to the superallowed β-decay

Recently, we applied, for the first time, the angular momentum and isospin-projected nuclear density functional theory to calculate isospin-symmetry breaking (ISB) corrections to superallowed beta-decay. With the calculated set of ISB corrections, we found that vertical bar V-ud vertical bar = 0.97447(23) for the leading element of the Cabibbo-Kobayashi-Maskawa matrix. This is in good agreement with both the recent result of Towner and Hardy (2008 Phys. Rev. C 77 025501) and the central value deduced from the neutron decay. In this paper, we extend our calculations of the ISB corrections covering all superallowed transitions Lambda, I-pi = 0(+), T = 1, T-z -> A, I-pi = 0(+), T = 1 and T-z + 1 where T-z = -1, 0, and A ranges from 10 to 74.