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

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.

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