Experimental Studies on Atomic Collisions

该计划的主要课题是涉及多重带电离子的相互作用以及电子，离子和光子与原子和分子的碰撞光谱方面。在三年的时间里，在东京城市大学和贝尔法斯特女王大学分别设计和建造了紧凑型电子束离子源（EBIS）和ECR离子源。除了建设两个离子源外，日英两国科学家还将通过15名以上科学家的互访，分享专业知识和专用设施。用EBIS测量了多电荷离子与原子和分子碰撞时电子捕获过程的横截面。研究了高电荷离子碰撞产生的多电荷分子的库仑爆炸。利用ECR离子源，研究了多电荷离子与原子和分子的状态间电荷转移反应。此外，还研究了金属原子碰撞时的电离过程。英国曼彻斯特大学和英国电子通信大学分别利用电子能谱仪研究了电子与原子和分子碰撞后的碰撞后相互作用（PCI）。在um发现了汞原子电离的PCI效应。在UEC使用专门为化学活性气体设计的光谱仪，在N_2O分子的a ~ 2e过程中也发现了类似的效果。达斯伯里实验室同步辐射测量分子的二维光电子能谱。在达斯伯里也研究了分子通过超激发态的解离过程。雷丁大学开发的协方差映射技术对于研究多电荷分子离子的解离过程具有重要的价值。在东京和静冈县举行了英日实验原子碰撞物理研讨会，讨论了互访取得的成果，并进一步促进了日英合作。少

Main subjects of this program are interactions involving multiply charged ions and aspects of collision spectroscopy of electrons, ions and photons with atoms and molecules. During three years, an compact Electron Beam Ion Source (EBIS) and an ECR Ion Source were designed and constructed at Tokyo Metropolitan University and The Queen's University of Belfast, resperctively. Besides the construction of the two ion sources, scientists of Japan and the UK could share the expertise and specialized facilities by the exchange visits of more than 15 scientists.Cross sections of electron capture processes in collisions of multi-charge ions with atoms and molecules were measured with the EBIS at TMU. Coulomb explosion of multi-chrge molecularions produced by collisions of highly charged ions was studied. State-to-state studies of charge transfer reactions of multiply charged ions with atoms and molecules were made by using the ECR ion source at QUB. Ionization processes of metal atoms in collisi … More ons of fast ions were also studied at QUB.Post Collisions Interactions (PCI) in collisions of electrons with atoms and molecules were studied by using electron spectrometers at the University of Manchester and The University of Electro-Communications, respectively. The PCI effect in ionization of Hg atom was found at the U.M.. The similar effect was also found in a to 2e processes of N_2O molecule by using the spectrometer at The UEC which is specially designed for chemically active gases.Two dimensional photo-electron spectra of molecules measured with Synchrotron Radiation at Daresbury Laboratory. The dissociation processes of molecules via super-excited states of molecules were also studied at Daresbury. Covariance mapping technique developed at The University of Reading seems very valuable for study of dissociation processes of multiply charged molecular ions.UK-Japan Seminar on Experimental Atomic Collision Physics was held at Tokyo and Shizuoka to discuss the results obtained by exchange visits and the further promotion of the collaboration between Japan and the UK. Less