U.S.-Federal Republic of Germany Cooperative Research on Van der Waals Complexes, Laser-stimulated Desorption and Multi-photon Ionization

该奖项支持亚利桑那州立大学林胜贤教授多次短期访问，与慕尼黑工业大学的E.W.Schlag教授合作。他们正在研究激光刺激固体表面吸附分子解吸或蒸发的机制，使用红外和紫外可见激光。他们计划继续研究范德华络合物的光谱位移和电子弛豫。此外，他们还将研究苯和其他二聚体的光谱性质和动力学过程，以及嵌入簇中的芳香族分子的光异构化作为簇大小的函数。他们还将在范德华团簇上进行光致电离阈值光谱的理论研究，以表明这将导致更准确地确定电离势，并提供关于团簇结构和振动频率的信息。林教授正在对当前化学中非常感兴趣的问题进行最先进的理论研究-激光促进分子从表面蒸发的研究和范德华络合物的光谱性质的研究。这项工作需要来自实验的投入。与施拉格博士和他的杰出实验者团队的合作提供了这种非常必要的互动。他们之前的合作产生了许多重大贡献。目前的进一步合作计划有望为分子吸收光能后发生的过程提供有价值的新见解。

This award supports Professor Sheng Hsien Lin of Arizona State University for several short term visits to collaborate with Prof. E. W. Schlag of the Technical University of Munich. They are studying the mechanisms of laser-stimulated desorption or vaporization of adsorbed molecules from solid surfaces, using both infrared and ultraviolet-visible lasers. They plan to continue their investigation of spectral shifts and electronic relaxation of van der Waals complexes. In addition, they will study the spectroscopic properties and dynamical processes of benzene and other dimers and the photoisomerization of an aromatic molecule embedded in a cluster as a function of cluster size. They will also carry out a theoretical study of photoionization threshold spectroscopy on van der Waals clusters to show that this leads to more accurate determination of ionization potential and provides information on the structure and vibrational frequencies of the cluster. Professor Lin is carrying out state of the art theoretical research on problems of great current interest in chemistry - studies of laser-stimulated vaporization of molecules from surfaces and of the spectral properties of van der Waals complexes. Such work requires input from experiments. Collaboration with Dr. Schlag and his outstanding group of experimentalists provides this very necessary interaction. Their prior collaboration has produced a number of significant contributions. Current plans for further collaboration promise valuable new insights into the processes that take place in a molecule after it has absorbed energy from light.