Spectroscopic Studies of Potically-Forbidden Electronically Excited States Produced by Collision of Metastable Excited Atoms.

亚稳态激发原子碰撞产生的政治禁止电子激发态的光谱研究。

• 批准号: 60470013
• 负责人: KUCHITSU Kozo
• 金额: $ 3.84万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60470013/
• 关键词: Metastable rare gas atoms; CN radical; Optically-forbidden excited state; Electronic emission spectroscopy; Potential energy curve, Dissociative excitation process; Negative cluster ion; 高励起リュードベリ原子:質量分析法

Atoms in long-lived excited states are produced in the gas phase by discharge or by electron impact, and excited electronic states of molecules are formed efficiently by means of collisional energy transfer. This method is particularly advantageous for production of potically forbidden excited states, which are not readily accessible by conventional photoexcitation. The purpose of the present study is to investigate the structural and dynamical properties of these excited states by various spectroscopic measurements. The following results have been obtained in the 1985-1986 fiscal years, and 22 papers and 38 oral presentations (besides 40 papers and 20 Talks on subjects closely relates to the present project) have been or are being completed.1. Dissociative excitation processes of molecules in collision with rare-gas metastable atoms:(1) Excited electronic states of CN radical produced by dissociative excitation of cyanides were studied by high-resolution emission spectroscopy, and the … More vibration-rotation levels of the <^4(pi)> state were assigned unambiguously.(2) The higher escited vibration-rotation levels of the <A^2> <pi> State were also assigned. The molecular constants and the RKR potential curves were obtained for the <^4(pi)> and <A^2> <pi> states.(3) Constants of perturbation interactions between these states and the <B^2> <(SIGMA)^+> state were obtained, and the dependences of electronic transition.probability on the vibrational quantum number were analyzed.(4) Cross section for production of the CN radical and the polarization of optical emission were studied as a function of the collision energy, and the rate of rotational relazation by collision of rare gas atoms was also estimated.(5) The rotational constants of higher vibrational states of the CN( <X^2> <(SIGMA)^+> ) state were determined by microwave spectroscopy.(6) Formation of doubly excited electronic excited states of <H_2O> , <NH_3> , HCl, etc. formed by collision with He( <2^3> S) and their dissociation processes were studied by analysis of their emission spectra and by dynamical calculations.(7) Electron spectroscopy was applied to electron emission processes from graphite or that covered with benzene by impact of He( <2^3> S) and Ne( <^3P_(0,2)> atoms, electron stattering and secondary electon emission from solid surface was studied.2. Formation of negative cluster ions by collision of highly excited Rydberg rare-gas atoms with molecular clusters. Mass spectroscopy was used to study electron attachment processes to clusters of <CO_2> , <NH_3> , <N_2O> <CCl_4> , pyridine etc. and some of their hydrated clusters. Less

通过放电或电子碰撞在气相中产生处于长寿命激发态的原子，并且通过碰撞能量转移有效地形成分子的激发电子态。这种方法对于产生不容易通过常规光激发获得的光禁止激发态特别有利。本研究的目的是通过各种光谱测量来研究这些激发态的结构和动力学性质。在1985-1986财政年度中，取得了以下成果，已经或正在完成22篇论文和38次口头报告（此外还有40篇论文和20次与本项目密切相关的主题的演讲）。分子与稀有气体亚稳原子碰撞时的解离激发过程：（1）用高分辨发射光谱研究了氰化物解离激发CN自由基的激发电子态，并计算了CN自由基的激发电子态 ...更多信息 <^4（pi）>态的振动-旋转能级被明确地指定。(2)还指定了&lt;A^2&gt;态的更高激发振动-旋转能级<pi>。得到了&lt;^4（pi）&gt;和&lt;A^2&gt;态的分子常数和RKR势曲线<pi>。(3)得到了这些态与&lt;B^2&gt; &lt;（SIGMA）^+&gt;态之间的微扰相互作用常数，并分析了电子跃迁几率与振动量子数的关系. (4)作为碰撞能量的函数，CN自由基和光发射的偏振的横截面的生产进行了研究，并通过碰撞稀有气体原子的转动弛豫率也进行了估计。(5)用微波光谱法测定了CN（&lt;X^2&gt; &lt;（SIGMA）^+&gt;）态高振动态的转动常数。(6)本文<H_2O><NH_3>通过对He（&lt;2^3&gt; S）碰撞形成的、、HCl等离子体的发射光谱分析和动力学计算，研究了它们的双激发电子激发态的形成及其解离过程。(7)应用电子能谱技术研究了He（&lt;2^3&gt; S）和Ne（&lt;^3P_（0，2）&gt;原子撞击石墨和苯覆盖石墨表面的电子发射过程，研究了固体表面的电子稳态和二次电子发射.高激发态里德堡稀有气体原子与分子团簇碰撞形成负团簇离子。本文用质谱法研究了电子与<CO_2><NH_3><N_2O><CCl_4>、吡啶等团簇及其水合团簇的结合过程。少

项目成果

K.Someda: J.Phys.Chem.90. 4044-4051 (1986)

K.Someda：J.Phys.Chem.90。

Y. Ozaki: ""Formation of the CN( <B^2> <(SIGMA)^+> )Fragment from HCN in a Discharged Helium Flow."" Chem. Phys.109. 345-355 (1986)

Y. Ozaki：“在排出的氦流中形成 CN( <B^2> <(SIGMA)^ > ) 碎片。”

H.Ito: Chem.Phys.98. 81-87 (1985)

H.Ito：化学物理98。

K. Mitsuke: ""Formation of Negative Cluster Ions in Collision of <SF_6> Clusters with Krypton Rydberg Atoms."" J. Phys. Chem.90. 1552-1556 (1986)

K. Mitsuke：“<SF_6> 簇与氪里德堡原子碰撞时形成负簇离子。”J. Phys。

H.Ito: J.Mol.Spectrosc.121. 84-90 (1987)

H.Ito：J.Mol.Spectrosc.121。