Variational calculations on Feshbachhyphen;type resonance states of threehyphen;electron atoms

摘要

The possible application of the MCEB method (for twohyphen;electron Feshbach resonances) to calculate the energies of resonance states of threehyphen;electron atoms is discussed. As an illustration, the method is applied to the 1s2s22Sresonance of Heminus;. The value obtained is improved by CI stabilization procedures.