US-UK Cooperative Research: Collision Induced and TransportProperties in Atomic and Molecular Fluids

该奖项将支持俄勒冈州立大学的Glenn Evans博士和两位英国科学家（牛津大学的Paul Madden博士和布里斯托尔大学的Michael Allen博士）在物理化学方面的合作研究。埃文斯博士将在两个密切相关的领域开展研究，涉及分子液体的结构和动力学特性理论。液相中的分子经历极其频繁的相遇，碰撞诱发的现象直接产生于这些相遇的结果。在这项合作研究的第一部分，Evans博士和Madden博士将讨论从碰撞诱导的去偏振光散射、振动能量转移和红外光谱的研究中了解到哪些类型的分子信息。与艾伦博士合作研究的第二部分将处理我们设想在由非球形分子组成的液体中发生碰撞的方式。研究人员将研究碰撞是否相关或不相关的问题。也就是说，一对特定的分子是否会频繁地重新相遇，还是这对分子一旦碰撞就不会再碰撞？这个问题的答案和结果，也反映在碰撞引起的散射中，将由液体性质的分析来决定，如粘度、导热性、分子旋转和平移的速率。分析理论和计算机模拟，以及实验数据，将被用来解释这些发现。该项目将受益于三名调查人员的互补专业知识。埃文斯博士是流体统计力学处理方面为数不多的世界级理论家之一。马登博士是诠释碰撞诱发现象的国际领军人物。艾伦博士是非球形物体流体性质模拟方面的公认专家。

This award will support collaborative research in physical chemistry between Dr. Glenn Evans, Oregon State University and two British scientists: Dr. Paul Madden, Oxford University and Dr. Michael Allen, University of Bristol. Dr. Evans will carry out research in two closely related areas involving the theory of structural and dynamic properties of molecular liquids. Molecules in a liquid phase undergo extremely frequent encounters and collision induced phenomena arise directly as a consequence of these encounters. In the first part of this collaborative study, Dr. Evans and Dr. Madden will address what type of molecular information is learned from the study of collision induced depolarized light scattering, vibrational energy transfer and infrared spectra. The second part of the collaborative study with Dr. Allen will deal with the way in which we envision the collisions to take place in liquids comprised of nonspherical molecules. The investigators will examine the question of whether the collisions are correlated or uncorrelated. That is, does a specific pair of molecules undergo frequent recollisions or does this pair once having collided never recollide? The answer to and the consequences of this question, which is also reflected in collision induced scattering, will be determined by the analysis of liquid properties, such as the viscosity, thermal conductivity, and rates of molecular rotation and translation. Analytical theory and computer simulation, together with experimental data, will be employed to interpret the findings. The project will benefit from the complementary expertise of the three investigators. Dr. Evans is one of a few world class theoreticians in the statistical mechanical treatment of fluids. Dr. Madden is an international leader in the interpretation of collision induced phenomena. Dr. Allen is an acknowledged expert in the simulation of properties of fluids of nonspherical bodies.