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利用发射光谱研究脉冲电晕放电中的自由基
引用本文:王文春,刘峰,张家良,任春生.利用发射光谱研究脉冲电晕放电中的自由基[J].光谱学与光谱分析,2004,24(11):1288-1292.
作者姓名:王文春  刘峰  张家良  任春生
作者单位:大连理工大学,三束材料改性国家重点实验室,辽宁,大连,116024
基金项目:国家自然科学基金委员会和中国工程物理研究院联合资助项目(10276008),辽宁省自然科学基金委员会(20022138)资助项目
摘    要:利用发射光谱技术在大气压下测量了以氮气为载气的不饱和水蒸气体系针-板式正脉冲电晕放电产生的OH(A^2∑→X^2Ⅱ0—O)自由基和O(3p^5P→3s^5S^02777.4nm),Ha(3P→2S 656.3nm)活性原子的发射光谱,并由N2(C^3Ⅱu→B^3Ⅱg)的△v=-3和△v=-4振动带序发射光谱强度计算得出N2(C,v)的相对振动布居及其振动温度,进而采用高斯分布拟合准确地求出了N2(C^3Ⅱu→B^3Ⅱg)的△v= 1振动带序发射光谱强度,从而可以由N2(C^3Ⅱu→B^3Ⅱg)的△v= 1振动带序与OH(A^2∑→X^2Ⅱ0—0)的重叠发射光谱中准确求出OH(A^2∑→X^2Ⅱ0—0)自由基的发射光谱强度。由发射光谱强度得到了激发态OH(A^3∑)自由基和O(3p^5P),Ha(3P)活性原子的布居。还研究了激发态OH(A^2∑)自由基和O(3p^5P),Ha(3P)活性原子的布居随放电电压和放电频率的变化以及氧气对激发态OH(A^2∑)自由基和O(3p^5P),Ha(3P)活性原子布居的影响。

关 键 词:OH  发射光谱  原子布居  激发态  对激发  放电电压  高斯分布  自由基  活性  不饱和
文章编号:1000-0593(2004)11-1288-05
修稿时间:2004年8月23日

Study of Radicals in Pulsed Corona Discharge by Emission Spectroscopy
WANG Wen chun,LIU Feng,ZHANG Jia liang,REN Chun sheng State Key Laboratory of Materials Modification by Laser,Ion and Electron Beams,Dalian University of Technology,Dalian ,China.Study of Radicals in Pulsed Corona Discharge by Emission Spectroscopy[J].Spectroscopy and Spectral Analysis,2004,24(11):1288-1292.
Authors:WANG Wen chun  LIU Feng  ZHANG Jia liang  REN Chun sheng State Key Laboratory of Materials Modification by Laser  Ion and Electron Beams  Dalian University of Technology  Dalian  China
Institution:State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian, China.
Abstract:The emission spectra of OH(A2 sigma --> X2 pi, O-O), O(3p5 P --> 3s5 S2(0)) and H(a)(3P --> 2S) produced by the positive pulsed corona discharge of N2 and H2O mixture in a needle-plate reactor have been successfully recorded against a severe electromagnetic interference coming from the pulsed corona discharge at one atmosphere. The relative populations and the vibrational temperature of N2 (C, v') were determined. The emission intensity of OH(A2 sigma --> X2 pi, 0-0) is obtained through the simulation of the emission spectra of the delta v = +1 vibration transition band of N2(C3 pi(u) --> B3 pi(g)). Relative populations of OH(A2 sigma), O(3p5 P) and H(a)(3P) have been obtained by the emission intensity of OH(A2 sigma --> X2 pi, 0-0), O(3p5 P --> 3s5 S2(0)) and H(a)(3P --> 2S) and Einstein's transition probability. The effects of discharge voltage and pulse repetition rate and oxygen flow on the relative populations of OH(A2 sigma), O(3p5 P) and H(a)(3P) are investigated.
Keywords:Emission spectrum  Pulsed corona  Radicals  Vibrational populations  
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