Oscillator strengths for S–S and S–D induced dipole transitions in alkali–rare gas systems

Electronic oscillator strengths for induced dipole transitions in alkali–rare gas systems have been calculated as a function of internuclear distance using adiabatic potential energy curves and molecular wavefunctions previously obtained from a pseudopotential model. The molecular transitions considered are those associated, in the separated atom limit, with S–S and S–D electric dipole forbidden transitions in the alkali atom. The oscillator strengths are found to be relatively large (about 10−2–10−4) at small and intermediate internuclear distances (R∼3–12 a.u.).