Transition of Highly Vibrationally Excited CO2 Molecules into the Vibrational Quasi Continuum

Transition of Highly Vibrationally Excited CO2 Molecules into the Vibrational Quasi Continuum 

When the number of quanta exceeds the critical value (5-18) (the so-called Chirikov stochasticity criterion Zaslavskii Chirikov, 1971), the molecular motion becomes quasi random and the modes become mixed in the vibrational quasi continuum. In the general case of polyatomic molecules, the critical excitation level decreases with number N of 

transitiou to quasi contiuuum takes place not at some fixed total vibrational energy E in general, but accordiug to (5-19) at some special point of critical relation between the number of quanta on asyuunetric and sy nunetric modes. It leads to two different approaches in the description of CO2 dissociation in non-thermal plasma through vibrational excitation one-temperature approximation and two-temperature approximation. If one mode (usually the asynunetric one) is predominantly excited, then the asyuunetric vibrational temperature significantly exceeds the syuunetric one T a Tvs). Transition to 

This critical transition can be found from the condition for the constant energy straight 

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