Relaxation in molecular infrared absorption. 2. Results for chlorodifluoromethane. Kinetics of resonant vibrational energy exchange

1986 ◽  
Vol 90 (19) ◽  
pp. 4555-4558 ◽  
Author(s):  
Shu Huei Liu ◽  
Ernest Grunwald
Keyword(s):  
Infrared Absorption ◽  
Energy Exchange ◽  
Vibrational Energy ◽  
Kinetics Of

The measurement of rapid rate processes by kinetic spectroscopy during a photolysis flash; vibrational relaxation of NO X 2 II from levels v 2

1972 ◽  
Vol 328 (1575) ◽  
pp. 515-527 ◽  
Keyword(s):  
Optical Density ◽  
Vibrational Relaxation ◽  
Energy Exchange ◽  
Vibrational Energy ◽  
Excited Level ◽  
Vibrational Levels ◽  
Order Of Magnitude ◽  
Rate Processes ◽  
Kinetics Of ◽  
Good Agreement

The recording of transient changes in optical density that take place during the period of a photolysis flash can, in principle, allow measurement of the kinetics of photo-processes having half-lives an order of magnitude less than the rise or decay time of the flash itself. The construction and use of a sensitive, ‘split-beam’ kinetic spectrophotometer is described, which permits the detection of transient changes in optical density > 0.01 and the measurement of half-lives >1 (us. The apparatus has been used to study the relaxation of NOX 2 II from its first and second excited vibrational levels in the presence of N 2 0 or CH4 and/or Ar. The efficiency of vibrational energy exchange with N 2 0 decreases with the vibrational quantum number of the excited level and this is shown to be consistent with the reduction in the vibrational spacing caused by anharmonicity. The measured collision numbers are in good agreement with those calculated on the baste of an empirical correlation (Callear 1965).

On kinetics modeling of vibrational energy exchange with application to the nozzle flow problem

1997 ◽  
Author(s):  
John Gilmore ◽  
Surendra Sharma ◽  
Deepak Bose ◽  
Graham Candler ◽  
John Gilmore ◽  
...  
Keyword(s):  
Energy Exchange ◽  
Flow Problem ◽  
Vibrational Energy ◽  
Nozzle Flow ◽  
Kinetics Modeling
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