Photodissociation Dynamics of Small Polyatomic Molecules: Collisional and Collisionless Processes

赖斯勒教授得到了实验物理化学计划的资助，进行了两部分的研究：一是小多原子分子的光解离动力学，重点是激发态的电子结构对动力学的影响。另一种是高振动激发的分子的碰撞解离。这些实验将用交叉分子束、多光电离探测和光引发振动激发进行，并将测量产物的态分布。最终目标是通过有选择地进入潜在表面的特定区域来实现对分子解离结果的更好控制。近期的目标是研究母体分子激发到产物片段激发的演化。要研究的体系是卤化氰化物及其相关分子。%当光线使分子分裂成碎片时，分子中的伸缩和弯曲运动对最终结果的影响将被研究。这项研究需要回答的问题是：这些碎片中形成了哪些产物，能量是如何分配的，即碎片内部各种形式的能量分布是什么？

Professor Reisler is supported by a grant from the Experimental Physical Chemistry Program for a two-part study: One is the photodissociation dynamics of small polyatomic molecules with emphasis on the influence of the electronic structure of the excited state on the dynamics. The other is collisional dissociation of highly vibrationally excited molecules. The experiments will be done with crossed molecular beams, multiphotoionization detection and photoinitiated vibrational excitation; product state distributions will be measured. The ultimate goal is to achieve better control over the outcomes of molecular dissociations by selective access to specific regions of the potential surface. The immediate goal is to study the evolution of parent molecule excitation into product fragment excitations. The systems to be studied are cyanogen halides and related molecules. %%% The influence of the stretching and bending motions in the molecule on the final outcome when light causes a molecule to come apart into fragments will be studied. The questions to be answered in this study are: What products are formed and how is the energy disposed of among these fragments, that is, what is the energy distribution into the various forms of internal energies of the fragments?