电子与分子碰撞的电离与解离过程涉及到电子、核及离子等多个粒子之间的相互作用，相关实验是研究量子多体动力学的重要手段。由于电子碰撞截面非常低，因此在态选择的分子退激发，尤其是高电荷态分子离子的多体碎解动力学研究方面一直没有取得突破性的进展。在本项目中，我们拟利用结合了传统的高分辨多道电子能谱技术与离子成像技术而建成了电子-离子符合谱仪，系统开展态选择的分子超激发态的解离动力学，分子框架下的电子俄歇过程、(e，2e)过程以及多电荷态分子离子的多体碎解动力学研究，深入探索电子-分子碰撞过程中的电子-电子、电子-核、核-核之间的量子多体关联机制。

The interactions among electrons, nuclei and ionic fragments play important roles in ionization and dissociation of molecules by electron collision. The relevant experiments are key tools in investigating many-particle quantum dynamics. Due to the extremely low cross sections, there is almost no breakthrough in electron-impact state-selective decay of molecular excited states and fragmentation dynamics of multi-ionized molecules in past decades. In this project, by using a state-of-art electron-ion coincidence spectrometer, which combines traditional high-resolution electron spectrometer and ion momentum imaging technique, we plan to study the dissociation dynamics from state-selective superexited states of molecules, Auger and (e, 2e) processes in molecular frame, as well as many-particle fragmentation dynamics of multi-ionized molecules. This may help us in deeply understanding the mechanism of many-particle quantum correlations.