Molecular Collision Dynamics: State-Resolved Studies by "Half-Collision" Techniques

分子碰撞动力学：通过“半碰撞”技术进行状态解析研究

• 批准号: 9224039
• 负责人: Paul Kleiber
• 金额: $ 28.53万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9224039&HistoricalAwards=false
• 关键词: Molecular; Collision; Dynamics; State; Resolved

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Professors P. Kleiber, K. Sando, and W. Stwalley of the University of Iowa will continue their investigations of the chemical dynamics of the reaction of hydrogen molecules with excited metal atoms, especially energy transfer collisons by means of state-selective half-collision techniques. Also continued are studies of the near threshold photodissociation dynamics of alkali diatomic molecules. %%% The proposed experiments on reactions between excited metal atoms and molecules will serve to test theoretical models for such processes. Significant deviations from the theoretically predicted behavior will require a revision of a model or at least place limits on its range of validity. Theoretical models also exist for the photodissociation of alkali diatomic molecules. In these models a dissociation is often viewed as a "half-collision" analog of a full collision process, the latter consisting of two incoming and two emerging particles. Such theories are, however, 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 any of the theoretical methods with confidence. The experiments done in this research will provide information that will assist in the clarification of many questions in the domain of collision and photodissociation dynamics.

在化学部实验物理化学计划的项目中，爱荷华大学的P. Kleiber，K。Sando和W. Stwalley将继续研究他们对氢分子与激发金属原子反应的化学动力学的研究，尤其是通过国家选择性半碰撞技术的能量转移Collison。 还在继续研究碱性分子的接近阈值光解离动力学。 %%;提出的关于激发金属原子和分子之间反应的实验将用于测试此类过程的理论模型。 与理论上预测的行为的显着偏差将需要修改模型或至少在其有效性范围内限制限制。 理论模型也存在于碱双原子分子的光解相结合。 在这些模型中，分离通常被视为完整碰撞过程的“半碰撞”类似物，后者由两个传入和两个新兴颗粒组成。 但是，这种理论通常不适合简单的物理解释，也不容易应用于复杂的解离过程。 在某些情况下，当前感兴趣的情况（例如超冷原子之间的碰撞），基础物理学的理解不够充分，无法自信地应用任何理论方法。 在这项研究中进行的实验将提供信息，这些信息将有助于阐明碰撞和光电分离动态领域中的许多问题。