Abstract
Collisional deactivation of OH(X2Π, v=1−4) by NH3 has been studied using pulsed laser photolysis coupled with the pulsed laser probe technique. Mixtures of O3/NH3/N2 were photolyzed at 248 nm, and time-resolved OH populations were monitored via the Δv = 0 and −3 sequences of the A2∑+−X2Πi transition. The following deactivation rate constants at 298 ± 1 K were obtained: (2.9 ± 0.2) × 10-11 for v = 1, (1.1 ± 0.2) × 10-10 for v = 2, (3.4 ± 0.4) × 10-10 for v = 3, and (4.1 ± 0.3) × 10-10 for v = 4 in units of cm3 molecule-1 s-1 (the errors are 2σ). The present study is the first report on the rate constant for OH(v=4) + NH3 reaction. The deactivation of OH(v≤3) by NH3 can be elucidated by nonresonant V−V energy transfer caused by long-range interaction; that of v = 4 deviates from the gap law.
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.
