%0 Journal Article
%T Dissociative ionization of methane by 54 eV electron impact<br>甲烷分子电子碰撞电离和解离的实验研究
%A 许慎跃
%A 马新文
%A 任雪光
%A T. Pflüger
%A A. Dorn
%A J. Ullrich
%J 物理学报
%D 2011
%I 
%X 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.
%K reaction microscope
%K dissociative ionization
%K energy deposition
%K kinetic energy distribution<br>反应显微成像谱仪
%K 电离解离
%K 能量沉积
%K 动能分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=F437B1BF01E7F4860B51EFEC45BFEE90&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=9CF7A0430CBB2DFD&sid=33EDF0F0EBBEAECE&eid=FCB827826B39D524&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=16