Citation:
Ruiz, A., Palao, J.P. & Heller, E.J. The activation of classical vibro-rotational resonances in diatom molecules through slow collision processes. Physics Letters A 375, 2555–2562 (2011).
Abstract:
Classical atom–diatom collisions at low velocities can be considered as a transient perturbation to the (integrable) diatomic system. We present an analysis that makes explicit the contributions of the terms of the Fourier expansion of the interaction potential to the changes in the molecular actions due to the collision process. Each term is associated with a resonance condition between the vibrational and rotational molecular frequencies, and leads to a vibrational, rotational or vibrotational contribution to the total action changes. The analysis is applied to the system 
