Mode-Selective Differential Scattering Studies of Ion-Molecule Reaction Dynamics

犹他大学的Scott L.Anderson博士是由化学系物理化学项目资助的离子-分子反应动力学的模式选择差示散射研究。这种散射技术将与理论相结合，用来阐明多原子阳离子反应的详细机理。将使用甲醛阳离子的反应来探索碰撞能量和振动对生成的化学的影响，并将与William Hase博士合作进行反应动力学的直接动力学模拟。对水与其他小阳离子反应的同步辐射研究，将与吴卓安博士和雷纳·德雷斯勒博士合作进行，不受实验室状态选择的影响。REMPI光电子能谱将探测Rydberg态的性质和开发新的阳离子选择路线，并将研究这些离子的反应。多原子分子之间的反应动力学一般取决于动能和内部能量在内部自由度之间的分配方式。将使用激光激发和离子散射方法将选定的反应物调节到不同的激发状态，并对所产生的碰撞和反应动力学进行实验测量、理论计算和模拟。这些研究将为我们理解在燃烧和星际化学中重要的重要气相反应提供至关重要的进展。

Dr. Scott L. Anderson of the University of Utah is funded for his research on mode-selective differential scattering studies of ion-molecule reaction dynamics by the Physical Chemistry Program of the Chemistry Division. This scattering technique will be used, in conjunction with theory, to elucidate the detailed mechnisms for reaction of polyatomic cations. Reactions of formaldehyde cation will be used to probe the effects of collisional energy and vibrations on resulting chemistry, and direct-dynamics simulations of the reaction dynamics will be done in collaboration with Dr. William Hase. Synchrotron radiation studies of reactions of water with other small cations, not amenable to laboratory state-selection, will be made in collaboration with Dr. Cheuk Ng and Dr. Rainer Dressler. REMPI photoelectron spectroscopy probing Rydberg state properties and developing new cation state-selection routes will be done, and the reactions of these ions will be studied. Reaction dynamics among polyatomic molecules generally depend on kinetic energy and upon how internal energy is partitioned among internal degrees of freedom. Laser excitation and ion scattering methods will be used to tune selected reactants to various states of excitation and the resulting collision and reaction dynamics will be experimentally measured and theoretically calculated and simulated. These studies will provide critically important advances in our understanding of important gas-phase reactions important in combustion and interstellar chemistries.