Electron-Impact Molecular Excitation and Dissociation as studied by the Infrared Emission Spectroscopy

通过红外发射光谱研究电子碰撞分子激发和解离

• 批准号: 02403007
• 负责人: OGAWA Teiichiro
• 金额: $ 14.72万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02403007/
• 关键词: Electron-impact; Reaction dynamics; Infrared emission; Excited dhydrogen atom; Paschen line; Emission cross section; Vibrataional and rotational distribution; Doppler profile; 電子衝突、; 反応素過程、; 赤外発光、; 励起水素原子、; パッシェン系列、; 発光断面積、; 振動回転分布、; 励起解離 /

In order to extend our investigations on the electron-impact excitation and dissociation processes using the UV-VIS emission spectroscopy, the use of the infrared emission spectroscopy has been proposed. The major results of our investigations are as follows.1) A new instrument for the measurement of the infrared emission produced in electron-motlcule collision processes has been designed and constructed.2) The emission spectra of the Paschen line of the excited hydrogen atom produced in e-H_2 collisions have been measured, and its emission cross sections have been determined for electron energies of 20-1000 eV.3) The azimuthal quantum number distribution of the excited hydrogen atom (n=4) has been determined from the emission cross sections of the Balmer and Pschen lines. Contrary to the theoretical expectation, there is a positive emission cross section of the 4f excited hydrogen atom.4) The mechanism for the formation of the 4f atom has been discussed. A curve crossing at a larger nuclear distance in the dissociation process would be the most plausible explanation.5) The vibrational and rotational distributions of several fragment species have been determined in the UV-VIS emissdion spectroscopy.However, their IR determination has not been completed, and is to be measured in future.6) Doppler profile measurements have been successfully carried out. The dissociation dynamics of H_2O, C_2H_2, C_2H_4 and HCI have been clarified.

为了扩展我们的研究的电子碰撞激发和解离过程中使用的UV-VIS发射光谱，使用红外发射光谱已被提出。我们的主要研究结果如下：1）设计并建造了一台测量电子-分子碰撞过程中红外辐射的新仪器。2）测量了电子-氢碰撞过程中激发态氢原子的帕邢线发射光谱。3）由Balmer线和Pschen线的发射截面确定了激发态氢原子（n=4）的方位角量子数分布。与理论预期相反，4f激发态氢原子的发射截面为正。4）讨论了4f原子的形成机制。5）用紫外-可见发射光谱测定了几种碎片的振动和转动分布，但它们的红外光谱测定还没有完成，有待于进一步测量。6）成功地进行了多普勒轮廓测量。阐明了H_2O、C_2H_2、C_2H_4和HCl的离解动力学。

项目成果

N.Yonekura, K.Nakashima and T.Ogawa: "Formation of H^<**>(n=4) in e-C_2H_4 collisions" Atomic Collision Res. Japan. 17. 18 (1991)

N.Yonekura、K.Nakashima 和 T.Okawa：“e-C_2H_4 碰撞中 H^<**>(n=4) 的形成”原子碰撞研究。

N.Yonekura,K.Nakashima,T.Ogawa: "Translational energy distributions and angular difference Doppler profiles of the excited hydrogen atom produced in e-C_2H_4 collisions." Journal of Chemical Physics. 97. 6276-6282 (1992)

N.Yonekura、K.Nakashima、T.Okawa：“e-C_2H_4 碰撞中产生的激发氢原子的平移能量分布和角差多普勒轮廓。”

小川禎一郎、米蔵誠哲、城戸政美、古屋謙治、中島慶治: "The emission cross section of the Paschen-α line produced in e-H_2 collisions." Chemistry Letters. 1994 in press. (1994)

Teiichiro Okawa、Seitetsu Yonezo、Masami Kido、Kenji Furuya、Keiji Nakajima：“e-H_2 碰撞中产生的 Paschen-α 谱线的发射截面”（1994 年出版）。

T.Ogawa, S.Ihara, N.Yonekura, T.Yasuda and K.Hakashima: "Fromation cross sections, emission cross sections and Fano plot of TE-separated H^<**> (n=3,4) produced in e-H_2O collisions" Chemical Physics. 168. 145-150 (1992)

T.Okawa、S.Ihara、N.Yonekura、T.Yasuda 和 K.Hakashima：“TE 分离的 H^<**> (n=3,4) 的起始截面、发射截面和 Fano 图

渡慶次学、中島慶治、小川禎一郎: "Rovibrational distributions of CH(A^2△) produced in e-C_2H_2 collisions." Chemistry Letters. 1993. 995-996 (1993)

Keiji To、Keiji Nakajima、Teiichiro Okawa：“e-C_2H_2 碰撞中产生的 CH(A^2△) 的旋转分布。” 1993 年。 995-996 (1993)