The quadrupole moments of Cd and Zn isotopes - an apology

In 2010 we presented an update of the nuclear quadrupole moments (Q) for the Cd and Zn isotopes, based essentially on straightforward density functional (DF) calculations (H. Haas and J.G. Correia, Hyperfine Interact 198, 133–137 (2010)). It has been apparent for some years that the standard DF procedure obviously fails, however, to reproduce the known electric-field gradient (EFG) for various systems, typical cases being Cu₂O, As and Sb, and the solid halogens. Recently a cure for this deficiency has been found in the hybrid DF technique. This method is now applied to solid Cd and Zn, and the resultant quadrupole moments are about 15 % smaller than in our earlier report. Also nuclear systematics, using the recently revised values of Q for the long-lived 11/2 isomers in¹¹¹Cd to¹²⁹Cd, together with earlier PAD data for^107,109Cd, leads to the same conclusion. In addition, EFG calculations for the cadmium dimethyl molecule further support the new values: Q(¹¹¹Cd, 5/2⁺) = .683(20) b, Q(⁶⁷Zn, gs) = .132(5) b. This implies, that the value for the atomic EFG in the (^{3}textit {P}_{1}) state of Zn must be revised, as it has been for Cd.