Nonequilibrium concentrations of the vibrationally excited OH radical in a methane flame measured by cavity ring-down spectroscopy

被引：36

作者：

Lozovsky, VA

Derzy, I

Cheskis, S ^{[1
]}

机构：

[1] Tel Aviv Univ, Sackler Fac Exact Sci, Sch Chem, IL-69978 Tel Aviv, Israel

[2] Russian Acad Sci, NN Semenov Chem Phys Inst, Moscow 117977, Russia

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 284卷 / 5-6期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/S0009-2614(97)01443-7

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：

Strong deviation from the Maxwell-Boltzmann equilibrium for the populations of the upsilon " = 0 and upsilon " = 1 vibrational levels of OH(X (2) Pi(i)) radicals was observed in the preflame zone of the methane/oxygen/nitrogen flame. The OH concentrations for the upsilon " = 0 and upsilon " = 1 levels were measured using cavity ring-down spectroscopy in the 30 Torr flat flame. In that flame the population ratio for upsilon " = 1/upsilon " = 0 is similar to 20 times the equilibrium value at locations similar to 6 mm below the luminescent zone. Above the flame front this ratio was found to be close to the equilibrium value. (C) 1998 Elsevier Science B.V.

引用

页码：407 / 411

页数：5

共 14 条

[1]

CHESKIS S, 1997, IN PRESS APPL PHYS B

[2] CALCULATED ROTATIONAL TRANSITION-PROBABILITIES FOR THE A-X SYSTEM OF OH [J].