Ve. Chernov et Ba. Zon, QUANTUM-DEFECT METHOD FOR POLAR-MOLECULES - ONE-ELECTRON GREEN-FUNCTION, Journal of physics. B, Atomic molecular and optical physics, 29(18), 1996, pp. 4161-4164
In a one-channel QD approximation, an analytic expression is obtained
for the electron Green function of a polar molecule exactly accounting
for the dipole moment of the molecular core. This result is valid in
the Born-Oppenheimer approximation.