Time-Resolved Spectroscopy of Active Chemical Species Formed in Discharge Plasma

A.氰基激发电子态的光谱及其电子结构分析(1)CN(B^2SIGMA^+-^4PI)跃迁的微扰线的分析高分辨率地分析了CN(B-X)发射光谱中17-14和17-16带的微扰线，并归属了^4PI态的振动能级。用Rydberg-Klein-Rees方法确定了该状态的势能曲线。分析了14-14带扰动谱线强度与Ar气压的关系，确定了~4Pi态与Ar和He原子碰撞的扰动振动能级的转动弛豫截面及其自然辐射寿命。(2)测定了CN(A^2pi)高激发振动态的分子常数及其势能曲线。测量和分析了CN(A-X)的发射光谱，并用NASC…测定了振动-转动能级的更丰富的分布。CN(A)态的形成机制是激发能从亚稳稀有气体原子转移到前驱体氰化物分子。B.含硅活性化学物种的发射光谱分析本文分析了SiCl4与活性氮反应生成的SiN自由基的高分辨发射光谱。分析了转动跃迁的相对强度，得到了电子跃迁矩与Si-N核间距离的关系，由此得到了B^2SIGMA^+态电子结构的详细信息。C.通过混合放电激发的用Ar气体稀释的Cl2和Br2分子和GeH4，得到了含有Ge原子的活性化学物种HGeCl和HGeBr.用激光诱导荧光光谱高分辨率测量了它们的电子跃迁，并通过分析A^1a“(V1V20)-X^1a‘(000)跃迁系列的转动结构确定了分子常数，时间分辨光谱分析表明，A^1a”态的自然辐射寿命约为400 ns。较少

A. Spectroscopy of the Excited Electronic States of Cyanogen Radical and Analysis of Their Electronic Structures(1) Analysis of the Perturbed Lines of the CN(B^2SIGMA^+-^4PI) TransitionsThe perturbed lines in the 17-14 and 17-16 bands of the CN(B-X) emission spectrum has been analyzed with high resolution, and the vibrational levels of the ^4PI state have been assigned. The potential energy curve for this state has been determined by the Rydberg- Klein-Rees method. The dependence of the intensities of the perturbed lines in the 14-14 band on the pressure of argon gas has been analyzed, and the cross sections for rotational relaxation of the perturbed vibrational levels of the ^4PI state by collision with argon and helium atoms and their natural radiative lifetimes have been determined.(2) Determination of the molecular constants for the highly excited vibrational states of CN(A^2PI) and its potential energy curveThe CN(A-X) emission spectrum has been measured and analyzed, and the nasc … More ent distributions of the vibrational-rotational levels have been determined. The mechanism of formation of the CN(A) state is found to be the transfer of excitation energy from the metastable rare gas atom to the precursor cyanide molecule. The molecular constants for the v(] SY.ltoreq.[)38 levels have been derived, and the potential energy curve has been determined by the RKR method.B. Analysis of Emission Spectra from Active Chemical Species Containing Si AtomsThe high-resolution emission spectrum of the SiN radical formed by the reaction of SiCl_4 and active nitrogen has been analyzed. The relative intensities of the rotational transitions from common initial levels have been analyzed, and the dependence of the electronic transition moment on the Si-N internuclear distance, from which detailed information on the electronic structure of the B^2SIGMA^+ state has been derived.C. Laser Spectroscopy of Active Chemical Species Containing Ge AtomsHGeCl and HGeBr have been produced by mixing discharge-excited Cl_2 and Br_2 molecules diluted with argon gas with GeH_4 downstream. Their electronic transitions have been measured with high resolution by laser-induced fluorescence spectroscopy, and molecular constants have been determined by analyzing the rotational structures of the A^1A"(v_1v_20)-X^1A'(000) transition series. A time-resolved spectroscopic analysis has shown that the natural radiative lifetime of the A^1A" state is measured to be about 400 ns. Less