The vibrational state distributions in both products of the reaction: O(P) + NO2 → O2 + NO |
| |
Authors: | Ian W M Smith Richard P Tuckett and Christopher J Whitham |
| |
Institution: | School of Chemistry, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK |
| |
Abstract: | A laser pulse-and-probe method has been used to determine the nascent vibrational populations in NO(v=0–4) and O2(v=6–11) formed in the thermal reaction: O(3P) + NO2 → O2(v) + NO(v). A frequency-tripled Nd: YAG laser is used to photolyse NO2, diluted tenfold in Ar, and laser-induced fluorescence spectroscopy in the NO A 2Σ+-X 2Π and O2 B 3Σ−u -X 3Σ−g electronic band system is used both to follow the kinetics of individual vibrational states and to determine the nascent vibrational distributions. The majority of the NO product is formed in v = 0 and the average vibrational yield is ≈ 4.6%. The O2 populations fall monotonically from v = 6 to 11 in a distribution close to what is expected on prior grounds. Based on a surprisal analysis, the average vibrational energy yield in O2 is ≈ 26%. The nature of the reaction dynamics is discussed. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|