Studies of Chemical Processes Using Rydberg Atoms

使用里德伯原子的化学过程研究

• 批准号: 0135247
• 负责人: F. Barry Dunning
• 金额: $ 23.1万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-04-15 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0135247&HistoricalAwards=false
• 关键词: Studies; Chemical; Processes; Using; Rydberg

In this project funded by the Experimental Physical Chemistry Program of the Chemistry Division, Dunning will use atoms in high Rydberg states as a tool with which to conduct a comprehensive study of the formation and properties of a wide variety of negative ion species. Electron transfer reactions in which the excited Rydberg electron is captured by a target molecule will be investigated to obtain information on the energetics of dissociative electron attachment. This will be accomplished through detailed measurements of the angular and velocity distributions of the product ions. Kinematic studies will be used to explore the mechanisms by which such species are created. The dependence of their lifetime on the rotational (and vibrational) states of the parent neutral will be investigated to gain new insights into the coupling of rotational and electronic motions. Collisions of dipole-bound ions with attaching and polar targets will be examined to explore their chemical properties.Atoms in which one electron is excited to a high-lying state will be used to conduct a comprehensive study of electron capture by molecules. Aside from their fundamental interest, the results of this research will have important practical application in areas such as breakdown in high-voltage electrical equipment, industrial plasma processing, and in screening the toxicological properties of new compounds. The work will provide practical training for both graduate and undergraduate students and equip them with a valuable array of experimental skills in preparation for advanced studies or entry into the scientific/technological workforce.

在这个由化学部实验物理化学计划资助的项目中，邓宁将使用高里德堡态原子作为工具，对各种负离子物种的形成和性质进行全面研究。我们将研究被激发的里德堡电子被目标分子俘获的电子转移反应，以获得有关解离电子附着的能量学信息。这将通过详细测量产物离子的角分布和速度分布来实现。运动学研究将被用来探索创造这种物种的机制。我们将研究它们的寿命与母体中性物的转动(和振动)态的关系，以获得对转动运动和电子运动耦合的新见解。将研究偶极束缚离子与附着靶和极性靶的碰撞，以探索它们的化学性质。其中一个电子被激发到高位态的原子将被用来全面研究分子对电子的俘获。除了它们的根本利益外，这项研究的结果还将在高压电气设备故障、工业等离子体处理以及筛选新化合物的毒理学特性等领域具有重要的实际应用价值。这项工作将为研究生和本科生提供实践培训，并使他们掌握一系列宝贵的实验技能，为深造或进入科学/技术工作大军做准备。