State Resolved Dynamics of Metal Atom-H2/CH4 Reactive Collisions

金属原子-H2/CH4反应碰撞的状态分辨动力学

• 批准号: 9613751
• 负责人: Paul Kleiber
• 金额: $ 30.83万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9613751&HistoricalAwards=false
• 关键词: State; Resolved; Dynamics; Metal; Atom

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Professors P. Kleiber and K. Sando of the University of Iowa will continue their investigations of state-resolved molecular dynamics using `half-collision` methods. They pioneered the application of the technique known as scattering state spectroscopy in order to study inelastic (including chemically reactive) collisions. In this project they will extend these experiments to collisions of metal atoms with the molecules H2 and CH4. Another, new technique involves `fractional collisions,` in which scattering resonances in a metal-ion/molecule collision complex are detected using orbital-following models. These are somewhat complementary techniques which help describe different aspects of the collision process. %%% Theoretical models exist for the photodissociation of alkali diatomic molecules, but such theories are often not amenable to simple physical interpretation and can not easily be applied to complex dissociation processes. In some cases of current interest, such as collisions between ultra-cold atoms, the underlying physics is not understood well enough to allow application of theoretical methods with confidence. The results of these experiments on reactions between excited metal atoms and molecules in relatively simple systems will allow theoretical dynamical models to be tested before applying them to more complicated problems in the domain of collision and photodissociation dynamics. Practical applications include a better understanding of chemical vapor deposition processes

在这个项目中，在实验物理化学计划的 化学部，教授P. Kleiber和K。大学的桑多 爱荷华州将继续他们的国家解决分子的调查， 使用“半碰撞”方法的动力学。 他们率先应用 散射态光谱技术的一部分， 研究非弹性（包括化学反应）碰撞。 在这 他们计划将这些实验扩展到金属原子的碰撞 分子H2和CH 4。 另一项新技术涉及 “分数碰撞”，其中散射共振在一个 金属离子/分子碰撞复合物的检测使用轨道跟踪 模型 这些都是一些互补的技术，有助于描述 碰撞过程的不同方面。 存在碱金属双原子光解离的理论模型 分子，但这样的理论往往不适合简单的物理 解释，并不能很容易地适用于复杂的解离 流程. 在当前感兴趣的某些情况下，例如 超冷原子，其基础物理学还没有被很好地理解， 使理论方法的应用充满信心。 的结果 这些关于激发态金属原子和分子之间反应的实验 在相对简单的系统中，将允许理论动力学模型 在将它们应用于该领域中更复杂的问题之前， 碰撞和光解离动力学。 实际应用 包括更好地理解化学气相沉积工艺