Vibration-vibration energy transfer in the v3mode of CO2

The vibration-vibration energy transfer of CO
2
gas initially excited to the first asymmetric stretch level (00
⁰
1) has been observed. Collisional pumping to the (01
¹
1) combination level is measured by monitoring the fluorescence due to the (01
¹
1) → (01
¹
0) band. The rate constant for the process: CO
2
(01
¹
1) + CO
2
(00
⁰
0) → CO
2
(00
⁰
1) + CO
2
(01
¹
0) is found to be
(5.3 \pm 1) \times 10^{6}
s
^-1
torr
^-1
.