Infrared laser induced energy transfer studies in S18O2

摘要: Abstract Vibrational energy transfer has been studied in S 18 O 2 , following pumping of the symmetric stretch (ν 1 ) by a Q-switched CO laser. Fluorescence from asymmetric 3 is monitored as function time laser pulse. This fluorescence rises with rate constant 74 ± 10 ms −1 torr and then decays 3.6 0.1 for itself. The effect rare gases on rise fall rates was also studied. results agree well those 16 are consistent double V-V picture which excitation distributed rapidly between stretches, but shared bend much more slowly. produces molecules stretches “hotter” than bend, giving to possibilities action stretch-to-bend transitions mode-selective vibrational enhancement chemical reactions. Also, new have derived kinetics processes mixtures. various isotopic mixtures SO kinetic analysis indicates that exhibit same rates.