NEAR RESONANT VIBRATIONAL ENERGY TRANSFER FROM THE (00$^{0}$1) VIBRATIONAL LEVEL OF $^{14}N_{2}O$ or $^{12}CO_{2}$ TO THE (m, $n^{1}$, 1) LEVELS OF THESE MOLECULES

Author Institution: Laboratoire de Spectronomie Moleculaire, Universit\'{e} de Paris VIVibrational energy transfers between $^{14}N_{2}O$ or $^{12}CO_{2}$ molecules, initially excited in the (00$^{0}$1) vibrational level, occur upon near resonant collisions such as: $M (m, n^{1}, 1) + M (m^{\prime}, n^{\prime},^{1^{\prime}}, O)$ $\leftrightarrow M (m, n^{1}, O) + M (m^{\prime}, n^{\prime} ^{1^{\prime}},1)$ These V-V transfers populate the (m,$n^{1}$,1) levels from the directly laser excited (00$^{0}$1) level. The rate constants involved for these transfers are very fast. They have been determined as a function of the temperature, between 300 and 800 K, by measuring the rise time of the fluorescence emitted in the hot bands (m, $n^{1}$, 1 - m, $n^{1}$, O transitions). Using a semi-classical theory, we have computed these exchange rates. The experimental data will be discussed on the basis of these computed results