Physical Review A - Atomic, Molecular, and Optical Physics
The asymptotic expansion method based on a core polarization potential for the Rydberg electron is reviewed and extended to the high angular momentum states of helium up to L=15. A comparison with recent large-scale configuration interaction calculations for the nonrelativistic energies shows that there is good agreement for L=7, but there are serious systematic disagreements for the states of higher angular momentum. A possible explanation is that there is an important class of configurations missing from the CI calculations. © 2009 The American Physical Society.
El-Wazni, R. and Drake, Gordon W. F.. (2009). Energies for the high- L rydberg states of helium: Asymptotic analysis. Physical Review A - Atomic, Molecular, and Optical Physics, 80 (6), 64501-1-64501-4.