Coulomb explosion of molecules in slow collisions of highly charge ions

在由原子和分子组成的高电荷元件的集合中，最主要的过程是电荷转移过程，在那些高电荷元件中捕获了一个电子或多个电子元件，使其从目标中获得了兴奋的状态水平。许多调查人员正在研究与原子目标聚合、如何、分子目标捕获过程的详细信息，直到现在进行了少量的调查，因为分子释放过程过于复杂。在这个项目中，我们已经开发了一个新的双同步时间（TOF）仪器，用于三个粒子同步检测。该实验性技术是非常强大的，可以解决由分子组成的多重充电元件的复合反应机制。特别是，对于代谢分子，所有反应过程都可以由这种技术解决。Then， for collision systems of HeイイD12イエD1+ and KrイD18イエD1+ with NイD22イエD2， OイD22イエD2， and CO targets， we have measured fragmentation of N2， C2 and CO in each electron capture processes and branching ratios for each reaction channel and kinetic energy release distribution for each fragmentation have been determined at some energies below 1 keV/amu。此外，在对它们的碰撞能量依赖性的衡量中，我们找到了一些新的现象，以便在碰撞后的预测和目标之间发生碰撞，在同一离子对的峰值将被分成两个峰值和分子离子峰值将被转移到一起，同时随着碰撞能量的退化而产生动力。《对二氧化碳排放后影响的观察》给了我们一些重要的信息，以理解碰撞动力学。

In collisions of highly charged ions with atom and molecules the most dominant processes are charge transfer processes in which highly charged ions capture an electron or many electrons into their excited state levels from targets. Many investigators have studied on electron capture processes of highly charge ions in collisions with atomic targets, however, details of the capture processes for molecular targets have been little investigated till now, because molecular explosion processes are too complicate.In this project, we have developed a new double-coincidence time-of-flight (TOF) instrument for three particle coincident detection. The experimental technique is very powerful to resolve complex reaction mechanisms in collisions of multiply charged ions with molecules. Especially for diatomic molecules, all reaction processes can be resolved by this technique. Then, for collision systems of HeィイD12ィエD1+ and KrィイD18ィエD1+ with NィイD22ィエD2, OィイD22ィエD2, and CO targets, we have measured fragmentation of N2, C2 and CO in each electron capture processes and branching ratios for each reaction channel and kinetic energy release distribution for each fragmentation have been determined at some energies below 1keV/amu. Also, in the measurements of their collision energy dependence, we have found some new phenomena due to the post collision between projectile ions and target ions after collisions, where coincident ion pair peaks are splitting into two peaks and molecular ion peaks are shifting by getting momentum with decreasing of the collision energy. The observation of the post co9llision effects gives us important information to understand the collision dynamics.