A classical mechanical study of the effects of vibration in inelastic He--H2 scattering

The classical trajectory study method has been used to investigate the effects of H2 vibration on inelastic scattering in the system He+H2. Specifically, earlier calculations which included H2 vibration have been repeated using the rigid rotor approximation. In addition, new calculations, both with and without H2 vibration, have been performed at total collision energies of 5 and 10 eV. It is found that H2 vibration exerts a noticeable effect at energies above 5 eV; however, even at 10 eV, the rigid rotor approximation works well for the most important transitions