Spectroscopy of Diatomic Molecules at Long Range

在化学系实验物理化学计划的这个项目中，Stwalley教授将研究双原子碱分子在核间距大于约10埃的“长程态”中的电子光谱。对这一区域能级的了解提供了关于长程势能曲线的信息，这对于理解光解和缔合电离过程是重要的。光学-光学双共振(OODR)和全光三重共振(AOTR)将被用来选择性地研究这些过程态的光谱和动力学。在这个项目中进行的实验中，激光被用来确定双原子分子的各种性质，以及研究这些双原子分子中的光诱导过程。在要收集的信息中，有关于光解离(光引起的键断裂)和缔合电离(成键伴随着电子的损失)的数据。这样的基本信息影响我们对各种领域的理解，包括大气过程和使用激光或等离子体的材料加工。

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Prof. Stwalley will study the electronic spectroscopy of diatomic alkali molecules in "long range states" in which internuclear distances are larger than about 10 Angstroms. Knowledge of the energy levels in this region gives information about the long-range potential energy curves, which is important for understanding photodissociation and associative ionization processes. Optical-optical double resonance (OODR) and All-Optical Triple Resonance (AOTR) will be used to study the spectroscopy and dynamics of these processes state selectively. In the experiments being conducted in this project, lasers are used to determine various properties of diatomic molecules as well as to study light-induced processes in these two-atom molecules. Among the information to be gathered are data regarding photodissociation (bond-breaking induced by light) and associative ionization (bond-forming with attendant loss of an electron). Fundamental information such as this has impact on our understanding of a variety of areas, including atmospheric processes and materials processing using lasers or plasmas.