Contribution of resonance tunneling of molecule to physical observables
  Probabilities of resonant tunneling through a potential barrier are compared for a rigid molecule and an excited molecule. It is shown that the resonance spectrum is mainly governed by the transmission resonance spectrum of the rigid molecule. Analytical expressions for the probability for the tunneling of the rigid molecule through a barrier allow resonance-spectrum-averaged observables, including quantum diffusion, to be estimated. 
P.M. Krassovitskiy and F.M. Pen'kov
quant-ph cond-mat.mes-hall math-ph math.MP