Theoretical estimates of quadrupole polarization and dynamical correlation effects in single-valence-electron ions

Theoretical estimates for the quadrupole polarizability ${\alpha }_q$ and the dynamical correlation factor $\beta$ are presented for 66 ions in the Li, Na, and Cu isoelectronic sequences. Unlike the dipole polarizability, the theoretical values for these quantities do not agree with analogous empirical parameters deduced from spectroscopic data for the Be, Mg, and Zn isoelectronic sequences using an unpenetrated deformable core model. However, modifications to this model have been suggested which utilize these theoretical values in the prediction of transition wavelengths.