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Molecular Axis Orientation in Charge Transfer Reactions Determined with a Reaction Microscope
Shao-feng Zhang,Xin-wen Ma*,Xiao-long Zhu
Author NameAffiliationE-mail
Shao-feng Zhang Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaGraduate University of Chinese Academy of Sciences, Beijing 100049, China  
Xin-wen Ma* Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China x.ma@impcas.ac.cn 
Xiao-long Zhu Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China  
Abstract:
Based on the reaction microscope at the institute of modern physics, the reaction mechanism in molecular ion-atom collisions is investigated experimentally. The features of this system is illustrated by a kinematically complete experiment performed for the collision process.Using the so-called list-mode data recording technique and the coincidence measurement,the momentum vector of each fragment from the molecular ion were recorded event by event.The orientation of the molecular axis for H2+ dissociation reactions could be determined for each event in the off-line analysis. The measured orientation of the molecular ion is believed the same as the one at the instance of collision under axial recoil approximation. The polar angle resolution of the molecular orientation of ±8o was obtained.
Key words:  Reaction microscope, Imaging technique, Molecular orientation, Hydrogen molecular ion, Dissociation
FundProject:
Molecular Axis Orientation in Charge Transfer Reactions Determined with a Reaction Microscope
张少锋,马新文*,朱小龙
摘要:
基于在近代物理研究所建成的反应显微成像谱仪,实验研究了在分子离子与He原子碰撞中的电荷交换反应机制. 通过运动学完全测量实验充分展示了此碰撞体系的特征. 由于采用了符合测量技术和数据列表模式记录数据,因此实验记录了每个事件中因分子离子解离而产生的碎片的三维动量信息. 在离线数据分析和处理中,根据解离碎片的动量可以确定每个事件中的H2+分子离子的分子轴取向. 在近轴反冲核近似下,可以认为实验测量得到的分子轴取向就是电荷交换碰撞时刻分子轴的取向. 实验中分子轴取向的
关键词:  反应显微成像谱仪,成像技术,分子轴取向,氢分子离子,解离
DOI:10.1088/1674-0068/22/06/621-626
分类号: