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(A2Σ→X2Π0—0)自由基和O(3p5P→3s5S027774nm),Hα(3P→2S6563nm)活性原子的发射光谱,并由N2(C3Πu→B3Πg)的Δv=-3和Δv=-4振动带序发射光谱强度计算得出N2(C,ν′)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(C3Πu→B3Πg)的Δv=+1振动带序发射光谱强度,从而可以由N2(C3Πu→B3Πg)的Δv=+1振动带序与OH(A2Σ→X2Π0—0)的重叠发射光谱中准确求出OH(A2Σ→X2Π0—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(A2Σ)自由基和O(3p5P),Hα(3P)活性原子的布居。还研究了激发态OH(A2Σ)自由基和O(3p5P),Hα(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(A2Σ)自由基和O(3p5P),Hα(3P)活性原子布居的影响。
The emission spectra of OH(A(2) E-->X-2 II, O-O), O(3p(5) P-->3s S-5(2)0) and H-alpha(3P-->2S) produced by the positive pulsed corona discharge of N-2 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 W, v') were determined. The emission intensity of OH(A(2) Sigma-->X-2 II, 0-0) is obtained through the simulation of the emission spectra of the Deltav = + 1 vibration transition band of N-2 (C (IIu)-I-3 --> B (IIg)-I-3). Relative populations of OH(A(2)Sigma), O(3p(5)P) and H-alpha (3P) have been obtained by the emission intensity of OH(A(2) Sigma --> X-2 II, 0-0), O(3p P-5 --> 3s S-5(2)0) and H-alpha (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(A(2)Sigma), O(3P P-5) and H-alpha (3P) are investigated.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2004年第11期1288-1292,共5页
Spectroscopy and Spectral Analysis
基金
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
