Collisional quenching of OH(A 2Σ+, υ′=0) by H2O between 211 and 294 K and the development of a unified model for quenching

被引：47

作者：

Bailey, AE

Heard, DE ^{[1
]}

Henderson, DA

Paul, PH

机构：

[1] Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England

[2] Sandia Natl Labs, Combust Res Facil, Div 8351, Livermore, CA 94550 USA

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 302卷 / 1-2期

基金：

英国工程与自然科学研究理事会; 英国自然环境研究理事会;

关键词：

D O I：

10.1016/S0009-2614(99)00076-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The cross-section for electronic quenching of OH(A (2)Sigma(+), upsilon' = 0) by H2O was found to increase from 82 +/- 8 Angstrom(2) at 294 K to 119 +/- 11 Angstrom(2) at 211 K. Both OH(A (2)Sigma(+)) and H2O display relatively large dipole moments, and a 'harpooned' mechanism occurring on a Lennard-Jones potential energy surface modified to include dipole moment effects was found to reproduce the observed temperature dependence of the cross-sections in the range 211-2300 K. The model, which is general, will enable corrections for the effects of quenching on laser-induced fluorescence signals to be made with a high degree of confidence in combustion and atmospheric media. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：132 / 138

页数：7

共 41 条

[1] Collisional quenching of OH (A(2)Sigma(+), upsilon'=0) by N-2, O-2 and CO2 between 204 and 294 K. Implications for atmospheric measurements of OH by laser-induced fluorescence [J].