Abstract
The potential energy curve for the metastable 4IIg state of the He anion is obtained from fully numerical Hartree–Fock (HF) calculations and is used to evaluate the spectroscopic constants. The resonant 4Σ state of He and the excited a3Σ state of He2 are also investigated. The 〈R2〉 expectation value calculated for numerical orbitals indicates a diffuse character of the anion wave functions.
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