报告题目

Evolving tools for ultrafast probing of atomic conformations of transient molecules

报 告 人

Prof. Chii-Dong Lin

University Distinguished Professor, Kansas State University, USA

报告地点

物理楼中211

报告时间

2016年6月17日 (星期五) 10:30

联 系 人

彭良友 (Tel: 62765027)

报告摘要

One of the grand scientific challenges of the 21st century is to be able to control chemical reaction pathways for specific results (the modern alchemy). Before this can happen, experimental tools must be developed to enable scientists to follow the change of the molecules at their own natural timescale-typically a few femtoseconds, and the positions of the constituent atoms-at sub-Angstrom resolutions. In this talk I will discuss three different methods based on technology that is nearly or already available where one can film the movement of atoms in a dynamically evolving molecule. The methods are all based on electron diffraction, where electrons are either generated by X-ray free-electron lasers (XFEL), or by rescattering electrons generated by mid-infrared lasers.