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Fast Vibrational Relaxation of OH (v=9) By Ammonia and Ozone



S A. Nizkorodov, W W. Harper, David Nesbitt


Vibrational relaxation of OH(X2II) in the Ņ=9 state by O3 and NH3 has been studied via flash-photolysis using high-resolution direct infrared absorption detection of OH in the Ņ= 11 <- 9 band. OH (nu = 9) removal by O3 occurs with a nearly gas-kinetic rate (ko, = 1.37 (15) x 10-10 cm3/s). Collisional removal by NH3 (KNH3 = 7.60(50) x 10-10 cm3/s) is two to three times higher than the hard-sphere collision limit, suggesting a resonant V-V energy transfer induced by long-range dipole-dipole interactions. An upper limit of 5 x 10-14 cm3/s is placed on OH(nu = 9) vibrational relaxation by argon.
Chemical Physics Letters


hydroxyl ammonia, kinetics, ozone, resonant energy transfer, vibrational relaxation


Nizkorodov, S. , Harper, W. and Nesbitt, D. (2001), Fast Vibrational Relaxation of OH (v=9) By Ammonia and Ozone, Chemical Physics Letters (Accessed June 4, 2023)
Created May 31, 2001, Updated October 12, 2021