Vibrational relaxation of NO( ν = 2, 3) by atomic oxygen

• Published in: Chemical physics letters 1996-09, Vol.260 (1), p.103-108
• Main Authors: Dodd, J.A., Singleton, S.M., Miller, S.M., Armstrong, P.S., Blumberg, W.A.M.
• Format: Article
• Language: English
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/0009-2614(96)00851-2

A two-laser, pump-probe arrangement has been used to measure room-temperature rate constants for the collision-induced relaxation of NO( ν = 2, 3) by O atoms. The rate constants k O( ν) are equal to (2.2 ± 0.2) × 10 −11 and (2.5 ± 0.3) × 10 −11 cm 3 s −1 for ν = 2 and 3, respectively. These values are significantly lower than previously measured values for ν = 1, but are in accord with model predictions assuming the role of a metastable NO 2 ∗ intermediate. The NO self-relaxation rate constants k NO( ν) have been measured to be (3.2 ± 0.3) × 10 −12 and (4.0 ± 0.4) × 10 −12 cm 3 s −1 for ν = 2 and 3, respectively, in reasonable agreement with published results.