Selected states of the EFςg+1 electronic manifold of the hydrogen molecule are computed as resonances of the four-body problem. Systematic improvement of the basis representation for the variational treatment is achieved through an energy-tracking optimization procedure. The resulting nonrelativistic energy is converged within a few nano-Hartree, while the predissociative width is found to be negligible at this level of accuracy. The four-particle nonrelativistic energies are appended with relativistic and quantum electrodynamics corrections which close the gap between the experimental observations and earlier theoretical work.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics