Rapid vibrational and rotational energy-transfer rates in heated carbon dioxide collisions by double-resonance laser spectroscopy
Abstract
Rates for resonant vibrational and rotational energy transfer from the 001 state by CO2 + CO2 collisions were measured. All data were obtained by double resonance spectroscopy with CO2 lasers in a 2.5 meter absorption cell at 700 K. Results for rotation transfer include pumped level relaxation and the response of other 001 levels with delta up to 18. These data are compared to four relevant collision models via a 35 level rate equation analysis. Sequence band (002 yields 101) and hot band (011 yields 110) lasing were used to observe resonant nu3 transfer relaxation involving 001 + 001 reversible 002 + 000, 001 + 100 reversible 101 + 000, and 001 + 010 reversible 011 + 000. A multilevel rate analysis was utilized to determine the rate coefficients for 001 going to the 002, the 101, and the 011 levels. Part of the hot band data is interpreted as due to 110 + 000 reversible 100 + 010, and the associated rate constant is estimated. Results are compared to the theory and to other experiments.
- Publication:
-
Thesis - Virginia Univ
- Pub Date:
- July 1982
- Bibcode:
- 1982uva..rept.....T
- Keywords:
-
- Carbon Dioxide;
- Energy Transfer;
- Laser Spectroscopy;
- Molecular Collisions;
- Rates (Per Time);
- Resonant Vibration;
- Carbon Dioxide Lasers;
- Coefficients;
- Collision Parameters;
- Constants;
- Molecular Relaxation;
- Atomic and Molecular Physics