Vibration-to-vibration energy transfer in near-resonant collisions

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Abstract
An analytic approach is presented for the calculation of vibration‐to‐vibration (VV) energy transfer in near‐resonant systems and is applied to several collision systems over the temperature range of 300–4000°K with particular emphasis on N2+CO collisions. Calculated values of VV probabilities for CO+N2 and CO+NO are in good agreement with experimental data. For CO+O2 and CO+D2, calculated probabilities are larger than high temperature experimental data by factors of 3 to 5. For all systems, including NO+N2, the calculated result at low temperatures (≃300°K) is in reasonable agreement with experiment. It is also shown that the VV probability for CO+N2 is very large compared with the VT probability for N2(v=1)+CO → N2(v=0)+CO at lower temperatures.