Difference potentials and electric transition dipole moments related to the repulsive states of H-H and H-He. Top: difference potential for the triplet transition 6 –h (blue dashedline) of H-H compared with the doublet transition 6 ²Σ⁺–C ²Σ⁺ of H-He (black line). Bottom: electric dipole moments of the triplet state transition of H-H (blue dashed line) and of the doublet state transition of H-He (black line).