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.

在这个实验物理化学项目中， 化学系教授P.Kleiber、K.桑多， W.爱荷华州大学的Stwalley将继续他们的 反应的化学动力学研究 氢分子与激发的金属原子，特别是能量 选择态半碰撞转移碰撞 技术. 还继续研究了近阈值 碱性双原子分子的光解离动力学。 %%% 激发态金属间反应的实验 原子和分子将用于测试理论模型， 这样的过程。 与理论上的严重偏差 预测的行为将需要修改模型或 最小限度地限制其有效性范围。 理论 也存在碱金属双原子的光解模型 分子。 在这些模型中，解离通常被视为 “半碰撞”模拟完全碰撞过程，后者 由两个入射粒子和两个出射粒子组成。 等 然而，理论往往不服从于简单的物理 解释，并不能很容易地适用于复杂的 解离过程 在当前感兴趣的某些情况下， 比如超冷原子之间的碰撞， 物理学还没有被很好地理解， 任何理论方法都有信心。 的 在这项研究中所做的实验将提供信息， 将有助于澄清许多问题， 碰撞和光解动力学领域。