✍ Scribed by Ronald L. Thommarson; George C Berend; Sidney W. Benson
No coin nor oath required. For personal study only.
Translation-vibration ( T -V ) and vibration-vibration (V-V) energy transfer processes in the N2-C02 system were investigated using classical trajectory techniques. Two empirical interaction potentials were employed. One is comprised of independent, atom-atom Morsetype functions operating between nonbonded atoms. The other included these atom-atom Morse functions plus Coulombic terms to account for the quadrupole-quadrupole intertion. Both interaction potentials led to similar T-V results. However, the result that COz(v3) is excited -lo3 times more efficiently than N ~( u = 1) was obtained, which is at variance with existing analytical theories of T-V energy transfer employing purely repulsive shortrange potentials. Different V-V energy transfer probabilities were obtained from the two interaction potentials. The most important finding is that only when electrostatic orientation effects are combined with short-range repulsive interactions is the near-resonant
V-V transfer found to be the dominant energy transfer path. This interaction potential also crudely accounts for the negative temperature dependence observed for this nearresonant V-V transfer at low temperatures (300-1000°K).
📜 SIMILAR VOLUMES
The first (Z(l)) and second (Zc2)) approximations to the rotational collision number of the Ar-N2 system are compared for a range of temperatures Although Z(l) and Zt2) . differ by a significant amount their difference r& mains nearly constant as a function of temperature. The effects of mass and p
possibk RSSOIIS for the non-monotonous tempa-aturs dependencf oE the q~~~d-rescmzm~~ emcrgy trmsf'er probability and relative contributions of short-range and long-range forces are discussed. Particular calcuhtions are made for the caze Nz-C02(v3) vibrational energy exchange.
We discuss the origin of reactive scattering resonances in absorption cross sections following the collinear photodissociation of symmetric triatomic molecules. The analysis of spectra for CO, dissociation, previously calculated by Kulander and Light, becomes very simple in terms of polar coordinate