Spectroscopy and Dynamics of Ions

Carl Lineberger教授得到了实验物理化学项目的资助，继续他在离子和离子簇的结构和动力学方面的研究。Lineberger博士将使用最先进的分子束、激光光谱和质谱方法来获取对理解分子键具有重要基础意义的信息。同轴光束机中的可调谐激光光解作用将被用作离子配合物的振动谱和离子发色团与弱离子簇键之间能量耦合率的探针。超声速膨胀离子源连接到同轴束流机，可以产生中等大小的簇离子，其红外解离将以高分辨率进行探测。其他实验将通过观察不稳定分子的假设偶极束缚态来扩展我们对负离子偶极束缚态的实验知识。紫外光电子能谱将用于研究一些有机双自由基，以及研究中性金属团簇的电子结构。此外，光吸收后单体的蒸发损失将用于获得大量选择的簇离子的低分辨率红外吸收光谱。

Professor Carl Lineberger is supported by a grant from The Experimental Physical Chemistry Program to continue his research in the structure and dynamics of ions and ionic clusters. Dr. Lineberger will use state-of-the-art molecular beam, laser spectroscopic, and mass spectroscopic methods to obtain information which is of fundamental importance in the understanding of molecular bonding. Tunable laser photodissociation in a coaxial beam machine will be employed as a probe of the vibrational spectra of ionic complexes and the rate of energy coupling between an ionic chromophore and the weak ion-cluster bond. A supersonic expansion ion source connected to the coaxial beam machine will enable the production of moderate-sized cluster ions, whose infrared dissociation will be probed in high resolution. Other experiments will expand our experimental knowledge of dipole bound states of negative ions by observing unstable molecules via their presumed dipole bound states. Ultraviolet photoelectron spectroscopy will be used to study a number of organic diradicals, as well as to investigate the electronic structure of neutral metal clusters. In addition, evaporative loss of monomers from cluster ions following photoabsorption will be used to obtain low resolution infrared absorption spectra of mass-selected cluster ions.