When creating an Atom using a set of Configurations, as opposed to SpinConfigurations and CSFs which fully define all quantum numbers or a coupling scheme, respectively, we should instead derive an energy expression for the configuration average energy as described by Fischer (1977) in section 2-1.1:

and Cowan (1981) in chapter 6:

When creating an

Atomusing a set ofConfigurations, as opposed toSpinConfigurations andCSFs which fully define all quantum numbers or a coupling scheme, respectively, we should instead derive an energy expression for the configuration average energy as described by Fischer (1977) in section 2-1.1:and Cowan (1981) in chapter 6: