物理学报2012，Vol.61Issue(18)：101-106,6.
电离效率对激光电离团簇的高价离子产物的影响
The influence of ionization efficiency on the multiply charged ions produced by laser-clusters interaction
摘要
Abstract
The productions of multiply charged ions in the interactions of intense nanosecond laser pulse with clusters have aroused broad interests in molecular physics. Benzene, cyclohexene and cyclohexane clusters are chosen to study the effect of multiphoton ionization (MPI) efficiency on the relative intensity of multiply charged ions, as they possess similar molecular structures and the same element constitutions. They are ionized with a 5 ns Nd-YAG nanosecond laser. The carbon charge state produced by cyclohexene and cyclo- hexane is about 4; while by benzene is only about 3. The ratios of Ca+/C2~ for cyc/ohexane, cyclohexene and benzene are 1.1, 0.6 and 0.4, respectively. The relative MPI efficiencies of three molecules are measured to be in the magnitude sequence of benzene 〉 cyclohexene 〉 cyclohenane by diffusion beam. Higher MPI efficiency of molecules can cause more than one molecules to be ionized at the edge of laser pulse, the Coulomb repelling force between adjacent ions leads clusters to early split into small size ones, which will prevent the production of the highly charged ions.关键词
团簇/高价离子/多光子电离/苯Key words
cluster/multiply charged ion/multiphoton ionization/benzene分类
数理科学引用本文复制引用
曲丕丞,王卫国,赵无垛,张桂秋,李海洋..电离效率对激光电离团簇的高价离子产物的影响[J].物理学报,2012,61(18):101-106,6.基金项目
国家自然科学基金（批准号：11004190,21077101）、国家重大科学仪器设备开发专项（批准号：2011YQ05006903,2011YQ05006904）和辽宁省自然科学基金（批准号：201102220）资助的课题. （）
