光谱学与光谱分析, 2009, 29 (4): 878, 网络出版: 2010-05-25
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
介质阻挡放电 氧气 大气谱带 发射光谱 电子温度 转动温度 Dielectric barrier discharge Oxygen Emission spectroscopy Electronic temperature Rotational temperature
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(b1Σ+g→X3Σ-g)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(a 1Δg, b 1Σ+g和A 3Σ+g)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(11 800±400) K远高于气体温度(650±20) K, 由于a 1Δg的辐射跃迁概率太小, 且A 3Σ+g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。
Abstract
The emission spectra of pure oxygen in dielectric barrier discharge at atmo spheric pressure were observed. Comparison between experimental and fittings pectra of oxygen A band (b 1Σ+g→X 3Σ-g)(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,(11 800±400) K,was much higher than the gas temperature,(650±20) K. The emission from a 1Δg or A 3Σ+u was not been observed,but atmospheric band with its resoluble rotational structure was measured.
谢维杰, 李龙海, 江举辉, 蔡伟民. 常压介质阻挡放电氧气大气谱带分析[J]. 光谱学与光谱分析, 2009, 29(4): 878. XIE Wei-jie, LI Long-hai, JIANG Ju-hui, CAI Wei-min. Analysis of Oxygen Atmospheric Band in Dielectric Barrier Discharge at Atmospheric Pressure[J]. Spectroscopy and Spectral Analysis, 2009, 29(4): 878.