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RESEARCH PRODUCT

Collisional Relaxation Processes Studied by Coherent Raman Spectroscopy for Major Species Present in Combustions

Guy MillotBruno LavorelHubert Berger

subject

symbols.namesakeChemistrysymbolsRelaxation (physics)Rate equationAtomic physicsSpectroscopyRaman spectroscopyMotional narrowingScalingSpectral line shapeRotational energy

description

The effects of collisional relaxation processes on the Q-branch profile of major species present in combustions have been studied by high resolution stimulated Raman spectroscopy. Particular interest has focused on the following collisional systems: N2-N2, O2-O2, CO2-CO2, O2-N2, N2-CO2 and N2-H2O. For each colliding pair, starting from accurate determinations of line broadening coefficients over a wide temperature range, state-to-state rates for rotational energy transfers have been deduced by using various fitting laws. Among these rate laws, special attention has been paid to the temperature dependence of the energy corrected scaling (ECS) law combined with a hybrid exponential-power law (EP) for the basis rate constants.

yearjournalcountryeditionlanguage
1992-01-01
https://doi.org/10.1007/978-3-642-77194-1_9