Spectroscopy of Diatomic Molecules at Long Range

在化学学部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离大于10埃的“远程状态”下的电子能谱。了解这一区域的能级，可以得到关于长程势能曲线的信息，这对于理解光解离和缔合电离过程是重要的。光-光双共振（OODR）和全光三重共振（AOTR）将选择性地研究这些过程状态的光谱和动力学。在本项目进行的实验中，激光被用来确定双原子分子的各种性质，并研究这些双原子分子的光诱导过程。在需要收集的信息中，有关于光解离（由光引起的键断裂）和结合电离（伴随电子损失的键形成）的数据。诸如此类的基本信息对我们对各种领域的理解产生了影响，包括大气过程和使用激光或等离子体处理材料。

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.