Abstract
Collisional vibrational energy transfer (VET), v' = 1 ..-->.. 0, and electronic quenching of OH(A/sup 2/..sigma../sup +/, v'= 1) are studied using time- and wavelength-resolved laser-induced fluorescence in a room-temperature flow system. Total removal cross sections are large, 30-120 /Angstrom//sup 2/, and generally decrease with increasing rotational quantum number, indicating the importance of anisotropic long-range attractive forces. The colliders studied fall into three categories: polar molecules H/sub 2/O and NH/sub 3/, efficient quenchers but ineffective at VET; CO/sub 2/, CH/sub 4/, and N/sub 2/O similar cross sections for each process; and N/sub 2/, SF/sub 6/, and CF/sub 4/, inefficient quenchers but efficient at VET. The rotational distribution for OH molecules within v' = 0 that have undergone VET with N/sub 2/ collider is hotter than the surrounding gas temperature and appears like an approximately 750 K thermal distribution.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
