Calculations of Configurations of Doubly Ionized Copper (Cu III)

The energy levels belonging to the configurations 3d(7)4s(2) and 3d(8)nℓ (nℓ = 4s, 5s, 4p 5p, 4d 5d 4f, and 5g) have been calculated. The radial energy integrals were treated as parameters and adjusted to give a least-squares fit to the observed levels. Two- and three-body effective electrostatic interactions for equivalent electrons were included, as well as two-body effective interactions for inequivalent electrons. Strong configuration interaction between 3d(7)4s(2) and 3d(8)4d was taken into account. Values of the parameters are given for all the above configurations, and the calculated levels are given for all except 3d(8)4s and 3d(8)4p (for which essentially equivalent results have been published). Leading eigenvector percentages are given in appropriate coupling schemes.