Energies of resonances in atoms and ions with three electrons

The energies of resonances of 2S symmetry were calculated for atoms and ions with three electrons, H2-, He-, and Li, using the stabilization technique. The variational wave function was expanded over a large number (up to 2030) of normalized three-electron basis functions. The basis functions that made significant contributions to the energies were selected using a special procedure. Many high-energy resonances were found with energies of H2- resonances ranging from 1 to 12 eV. The calculated energies of some He- and Li resonances were compared with the experimental data and calculations of other authors. The selected basis set of three-electron wave functions was found to be efficient in calculations of high-energy resonances