Calculation of the Lowest 2S Resonance State of He− by a Stabilization Method

Аннотация

The parameters of the lowest ²S resonance state of the He⁻ system were calculated using the Coulomb potential stabilization method. It was found that the errors of the resonance energy and width have the same character as that in the earlier studied two-electron systems H⁻, He, and Li⁺. It was shown that the errors can be minimized using a single-electron basis sets, which provides the best reproduction of the low-lying states of the helium atom.