低压烃类火焰中时间分辨的CH（A(2)Δ和B(2)Σ⁻）激光诱导荧光

Time-resolved CH (A(2)Delta and B(2)Sigma(-)) laser-induced fluorescence in low pressure hydrocarbon flames.

作者信息

Rensberger K J, Dyer M J, Copeland R A

出版信息

Appl Opt. 1988 Sep 1;27(17):3679-89. doi: 10.1364/AO.27.003679.

DOI:10.1364/AO.27.003679

PMID:20539441

Abstract

Total collisional removal rate constants for the CH A(2)Delta and B(2)Sigma(-) electronic states are obtained in low pressure (<20-Torr) hydrocarbon flames. The B state is consistently removed ~70% faster than the A state. Variations of +/-50% are observed for different rotational levels and positions in the flame. For these flames, A-state emission following excitation of the B state indicates a rapid electronic-to-electronic energy transfer pathway that is insensitive to collision environment. Upper limits to the collider specific cross sections are obtained for H(2)O, N(2), and CO(2). The CH concentration and temperature profiles are measured and parametrized using a unique method.

摘要

在低压（<20托）烃类火焰中获得了CH A(2)Δ和B(2)Σ⁻电子态的总碰撞去除速率常数。B态的去除速度始终比A态快约70%。在火焰中不同的转动能级和位置观察到了±50%的变化。对于这些火焰，B态激发后的A态发射表明存在一条对碰撞环境不敏感的快速电子到电子的能量转移途径。获得了H₂O、N₂和CO₂的碰撞体特定截面的上限。使用一种独特的方法测量并参数化了CH浓度和温度分布。