物理学报2011，Vol.60Issue(9)：284-289,6.
甲烷分子电子碰撞电离和解离的实验研究
Dissociative ionization of methane by 54 eV electron impact
摘要
Abstract
The dissociative ionization process of methane induced by 54eV electron impact is investigated using an advanced reaction microscope. In the present paper, our attention is specially paid to the kinetic energy distributions of the CH＋2,CH＋ and C＋ fragments. Energy deposition spectra are presented for these fragments of different kinetic energies. It is shown that the dissociations from the （2a1） -1 and （1t2） -2（3a1） states of CH＋4 are the dominant contributions of the CH＋2, CH＋ and C＋ fragments. The kinetic energy of fragment is sensitive to the electronic state of its parent ion. Fragment ions with kinetic energies lower than 0.1 eV are mainly from the dissociation of （2a1） -1 state, and partly from the dissociation of （1t2） -2（3a1） state; the ions with energies between 0.1 eV and 0.3 eV are contrituted equally by the two states; the ions with energies higher than 0.4 eV are formed dominantly from the dissociation of （1t2） -2（3a1） state.关键词
反应显微成像谱仪/电离解离/能量沉积/动能分布Key words
reaction microscope/dissociative ionization/energy deposition/kinetic energy distribution分类
数理科学引用本文复制引用
许慎跃,马新文,任雪光,T. Pfluger,A. Dorn,J. Ullrich..甲烷分子电子碰撞电离和解离的实验研究[J].物理学报,2011,60(9):284-289,6.基金项目
国家自然科学基金（批准号：10979007 10674140）资助的课题 （）
