Improved RCI techniques for Atomic 4f^n Excitation Energies and Polarizabilities
Journal of Physics B: Atomic, Molecular and Optical Physics
We propose an efficient method by which previously computationally expensive, but moderately important, pair correlation effects can be incorporated into fn excitation energies. Application is to Gd IV. Secondly, we extend two methods of obtaining static and tensor dipole polarizabilities and apply them to the Ni II ground state. The first uses the sum over the f-values approach, and the second is variational.
Beck, D. R. and Pan, Lin, "Improved RCI techniques for Atomic 4f^n Excitation Energies and Polarizabilities" (2010). Science and Mathematics Faculty Publications. 156.