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Rydberg states of He of the configuration (1s nl)1,3D, 1,3F for n=3-7 have been calculated using polarized-orbital and related approximations, notably the extended-polarization approximation. The singlet states are superior in the full polarized-orbital approximation whereas the triplet cases are better in the extended-polarization approximation. Reasons for this behavior are given. Comparison is also made with recent diagrammatic calculations of Chang and Poe. A comment on some recent polarized-orbital calculations of photoionization is included.
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Temkin et al. (1974) studied this question.
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