Valence and excited dipole-bound states of polar diatomic anions: LiH−, LiF−, LiCl−, NaH−, NaF−, NaCl−, BeO−, and MgO−

Valence and excited states of the anions formed by the polar molecules LiH, LiF, LiCl, NaH, NaF, NaCl, BeO, and MgO are calculated by the recently developed electron-attachment equation-of-motion coupled-cluster (EA-EOMCC) method. The LiH−, NaH−, and LiF− anions are found to possess two excited dipole-bound states and the LiCl−, NaF−, NaCl−, BeO−, and MgO− anions have three excited dipole-bound states. The critical values of the dipole moment required to sustain the first, second, etc., excited state appears to be specific for each class of polar molecules.