| VIBRATIONAL RELAXATION OF OZONE IN $O_{3}-O_{2}$ AND $O_{3}-N_{2}$ GAS MIXTURES FROM INFRARED DOUBLE-RESONANCE MEASUREMENTS (1991) | |||||||||
Abstract | |||||||||
| Author Institution: LPMA, Bte 76, T13, CNRS, Universit\'e P. et M. Curic. 4. Numerous close coincidences can be found between $CO_{2}$ laser lines and $O_{3}$ rovibrational lines assigned to different fundamental and hot bands such as $v_{1}, v_{3}, v_{1} + v_{3}-v_{1}, 2v_{3}+v_{3},v_{2}+v_{3}-v_{2}$,... Therefore it proved possible to study collision-induced vibrational energy transfers in $O_{3}$ by means of a time-resolved double-resonance technique using two $CO_{2}$ lasers. These experiments performed in the neat gas as well as in mixtures with $O_{2}$ and $N_{2}$ have allowed to observe a very fast intermode transfer occurring between the $v_{1}$ and$ v_{3}$ Coriolis-coupled modes and to measure the corresponding rate constant. The near-resonant vibrational energy transfer populating the $v_{2}+v_{3}$ state has also been investigated, as well as the $(v_{1}, v_{3})\rightarrow v_{2}$ intermode transfer and the vibrational deexcitation of the $V_{1}, V_{2} and V_{3}$ states. From a simplifed analytical treatment of the kinetic model we have deduced the rate coefficients corresponding to the investigated processes. | |||||||||
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