Calculations of Configurations of Doubly Ionized Copper (Cu III).

The energy levels belonging to the configurations 3 4 and 3 ( = 4, 5, 4 5, 4 5 4, and 5) 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 3 4 and 3 4 was taken into account. Values of the parameters are given for all the above configurations, and the calculated levels are given for all except 3 4 and 3 4 (for which essentially equivalent results have been published). Leading eigenvector percentages are given in appropriate coupling schemes.