常压介质阻挡放电氧气大气谱带分析  

Analysis of Oxygen Atmospheric Band in Dielectric Barrier Discharge at Atmospheric Pressure

作　　者：谢维杰[1,2] 李龙海[1,3] 江举辉[1] 蔡伟民[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]海军潜艇学院,山东青岛266071 [3]江苏大学环境科学与工程学院,江苏镇江212013

出　　处：《光谱学与光谱分析》2009年第4期878-882,共5页Spectroscopy and Spectral Analysis

基　　金：上海市纳米专项基金项目(0752nm007)资助

摘　　要：观测了氧气常压介质阻挡放电过程产生的发射光谱,利用氧气大气谱带(b1Σg+→X3Σg-)转动结构的拟合光谱与实验光谱的比较和氧原子发射谱线测量了等离子体的气体温度和电子温度;通过分析氧气常见激发态(a1Δg,b1Σg+和A3Σg+)的产生和猝灭途径,结合氧气激发、解离过程的动力学数据,探讨了在大气压介质阻挡放电条件下氧气大气谱带的产生原因。结果表明:在该实验条件下氧气常压介质阻挡放电时电子温度(11800±400)K远高于气体温度(650±20)K,由于a1Δg的辐射跃迁概率太小,且A3Σg+在高气压下很容易被猝灭,实验中没有观测到这两个激发态的辐射,而测到了具有清晰转动结构的氧气大气谱带。The emission spectra of pure oxygen in dielectric barrier discharge at atmospheric pressure were observed. Comparison between experimental and fitting spectra of oxygen A band （b1Σg＋→X3Σg-）（0, 0）was used to determine the gas temperature, and the electronic temperature was calculated from O I lines. The causation of oxygen A band in atmospheric dielectric barrier discharge was discussed by means of analysis of producing and quenching approaches. The result showed that the electronic temperature, （11800±400）K, was much higher than the gas temperature, （650±20）K. The emission from a a1Δg or A3Σg was not been observed, but atmospheric band with its resoluhle rotational structure was measured.

关 键 词：介质阻挡放电 氧气 大气谱带 发射光谱 电子温度 转动温度 

分 类 号：O644[理学—物理化学]