Multiple Resonance Spectroscopy and Molecular Dynamics

多重共振光谱和分子动力学

• 批准号: 9320110
• 负责人: A. Marjatta Lyyra
• 金额: $ 20.32万
• 依托单位: Temple University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-15 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9320110&HistoricalAwards=false
• 关键词: Multiple; Resonance; Spectroscopy; Molecular; Dynamics

In this project in the Physical Chemistry Program of the Chemistry Division, Prof. Marjatta Lyyra of Temple University will investigate the long range interactions, at separations in excess of 10 Angstroms, between pairs of alkali atoms in order to map out the potential surface near the dissociation limit of alkali diatomic molecules. The sodium molecule is the principal species to be investigated. The molecules are prepared in their long range states by multiple laser excitation. A new multiple resonance technique, stimulated radiative dissociation, will be used to study photodissociation dynamics state selectively as function of molecular rotation and and energy in order to achieve full understanding of long range nonadiabatic mixing of states. The correlation of the initial internuclear distance prepared as dissociation begins with the strengths of the nonadiabatic couplings will also be studied. As part of this work new methods will be developed to enhance the detection of continuous wave multiple resonance signals. This research contributes to the understanding of behavior of atoms at large internuclear separations at the onset of chemical reactions. At large internuclear separations many electronic energy states are often closely spaced, making for couplings betwen them which affect the bond-breaking photodissociation, and bond-forming associative ionization processes. The information gathered in this work will be of assistance in understanding the results of contemporary research on atomic collisions at ultra low temperatures.

在这个项目中的物理化学计划的化学 天普大学的Marjatta Lyyra教授将调查 长程相互作用，在超过10埃的间距， 在成对的碱金属原子之间， 接近碱性双原子分子的离解极限。 钠 分子是研究的主要物种。 所述分子 通过多重激光激发制备它们的长程态。 一个新 多共振技术，受激辐射解离，将是 用于研究光解离动力学状态选择性地作为函数， 分子的旋转和能量，以达到充分的理解 长程非绝热态混合的理论 的相关性 初始核间距准备作为解离开始与 还将研究非绝热耦合的强度。 的一部分 这项工作将开发新的方法，以加强检测 连续波多重共振信号。 这项研究有助于理解原子在 在化学反应开始时的大的核间分离。 在 许多电子能态通常 紧密间隔，使他们之间的耦合，影响 断键光解离和成键缔合电离 流程. 在这项工作中收集的信息将有所帮助 在理解当代原子能研究的结果方面， 超低温下的碰撞