原子与分子物理学报2012，Vol.29Issue(6)：1040-1044,5.DOI:10.3969/j.issn.1000-0364.2012.06.017
800 nm激光作用下碘乙烷的多光子电离解离研究
Study on multiphoton ionization dissociation processes of ethyl iodide at 800 nm laser radiation
摘要
Abstract
Multiphoton ionization-dissociation(MPID)process of ethyl iodide are studied at 800 nm femtosecond laser, and time-of-flight mass spectrometer of ethyl iodide are obtained. The result of laser power index shows that the parent-ion mainly undergoes the 3 + 3 resonant enhanced multiphoton ionization (REMPI) process. The percentage of part fragment ions to the total ion current and the laser intensity dependence of the molecule are measured. Based on the experiment results, the multiphoton ionization-dissociation mechanism of ethyl iodide is discussed. The conclusion is that most of ion fragments are produced by C2H5I+ dissociation, this is consistent with the parent-ion dissociation staircase. The two possible dissociation channels of parent-ion are analyed, but the C-I dissociation is the main channel. We also use Gaussian 03 calculated the energy change of the two channels with B3LYP/3-21G basis set, the theortical results further demonstrated the experiment.关键词
质谱/多光子电离/碘乙烷/光强指数Key words
mass spectroum/MPI/ethyl iodide/laser power index分类
数理科学引用本文复制引用
李文娟,周留柱,孔真真,刘冬梅,张树东,孔祥和..800 nm激光作用下碘乙烷的多光子电离解离研究[J].原子与分子物理学报,2012,29(6):1040-1044,5.基金项目
山东省自主创新重大科技专项计划项目(2006gg1104089) （2006gg1104089）
曲阜师范大学博士科研启动基金 （）
