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

基本信息

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

项目摘要

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

在化学系实验物理化学项目的这个项目中，爱荷华大学的 P. Kleiber 和 K. Sando 教授将继续使用“半碰撞”方法研究状态分辨分子动力学。他们率先应用了散射态光谱技术来研究非弹性（包括化学反应性）碰撞。在这个项目中，他们将把这些实验扩展到金属原子与分子 H2 和 CH4 的碰撞。另一种新技术涉及“分数碰撞”，其中使用轨道跟踪模型检测金属离子/分子碰撞复合体中的散射共振。这些在某种程度上是互补的技术，有助于描述碰撞过程的不同方面。 %%% 碱性双原子分子的光解离存在理论模型，但此类理论通常不适合简单的物理解释，并且不能轻易应用于复杂的解离过程。在当前感兴趣的某些情况下，例如超冷原子之间的碰撞，人们对基础物理的了解还不够充分，无法放心地应用理论方法。这些关于相对简单系统中受激金属原子和分子之间反应的实验结果将允许在将理论动力学模型应用于碰撞和光解动力学领域中更复杂的问题之前对其进行测试。实际应用包括更好地了解化学气相沉积工艺