The equilibration of CH3F vibrational modes with O2 has been studied in a CH3F/O2 mixture using infrared laser fluorescence techniques. Under "low level excitation" experimental conditions, all CH3F modes are shown to come into equilibrium with oxygen at the same rate, indicating that the CH3F modes are tightly coupled by collisions on the time scale of CH3F/O2 equilibration. The concept of vibrational quanta conservation is introduced and shown to be a powerful diagnostic method for mapping vibration-vibration energy transfer pathways in small molecules. A comparison is made of the observed results in CH3F/O2 mixtures with a previous study of CH4/O2.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry