Attosecond Electron Dynamics

在这个奖项，由化学系的化学结构，动力学和机制A（CSDM-A）计划资助，教授斯蒂芬R。加州大学伯克利分校的利昂和他的研究生正在研究控制化学反应的基本过程，即分子中的电子如何移动，以及这些电子的移动如何影响较重原子核的移动。 在进行这些实验的过程中，Leone教授和他的团队正在开发基于阿秒激光的新工具和方法来进行这些研究。 该项目的研究生将接受实验物理化学的培训。Leone教授和他的研究小组正在使用基于阿秒激光的方法进行原子和分子的实验。 正在进行的项目包括：（1）研究原子中强场电离的阿秒动力学;（2）研究双电荷离子中的相干性和研究电子相干性的相位;（3）探索原子的顺序和非顺序双电离中的排列;（4）探测隧道电离过程中离子核的电子重构;（5）研究原子中电子的相互作用。（5）溴甲烷中自旋轨道态叠加的研究;（6）一系列1-溴代、正碘代烷烃（其中n为烷烃的长度）强场电离中电荷迁移的研究;（7）溴在混合电子态下的离解研究。 在这些测量过程中，Leone教授和他的学生将进一步开发阿秒化学动力学的新实验工具和方法，这是美国直到最近才落后的领域。

In this award, funded by the Chemical Structure, Dynamics and Mechanisms A (CSDM-A) Program of the Division of Chemistry, Professor Stephen R. Leone of the University of California - Berkeley and his graduate student researchers are investigating the fundamental processes that govern chemical reactivity, namely how electrons in molecules move, and how the movement of these electrons influences the movement of the heavier nuclei. In doing these experiments, Prof. Leone and his group are developing new tools and methods for conducting these studies, based upon attosecond lasers. Graduate students working on this project will receive training in experimental physical chemistry.Prof. Leone and his research group are conducting experiments on atoms and molecules, using attosecond laser-based methods. Among the projects being carried out are: (1) the study of attosecond dynamics of strong-field ionization in atoms; (2) the investigation of coherences in doubly-charged ions and a study of the phases of electronic coherences; (3) the exploration of alignment in sequential and nonsequential double ionization of atoms; (4) the detection of electron reconfiguration of the ion core during tunnel ionization; (5) the study of spin-orbit state superposition in methyl bromide; (6) an investigation of charge migration in the strong-field ionization of a series of 1-bromo, n-iodo alkanes (where n is the length of the alkane); and (7) the study of the dissociation of bromine in mixed electronic states. Over the course of these measurements, Prof. Leone and his students will further develop new experimental tools and methods in attosecond chemical dynamics, a domain in which the US has lagged until recently.