Polarized Electron and Photon Physics

偏振电子和光子物理

• 批准号: 0653379
• 负责人: Timothy Gay
• 金额: --
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653379&HistoricalAwards=false
• 关键词: Polarized; Electron; Photon; Physics

This project involves the study of collisions between polarized electrons or polarized photons with chiral, or ?handed? molecules and simple diatomic molecules. The proposed experiments address physics questions about the dynamics of electron/photon-molecule scattering, particularly with regard to spin-dependent effects and the collisional distribution of angular momentum. They would also provide important information for applications requiring knowledge of basic electron-molecule and photon-molecule scattering cross sections, including the modeling of industrial and astrophysical plasmas. Improved sources and analyzers of polarized electrons will also be developed. This latter work holds the promise of providing new analytical tools for biological and materials research, and for industry. Experiments will also explore effects when ?toroidal? light, i.e. light with both orbital and spin angular momentum, ionizes chiral molecules.These experiments will have an impact beyond the immediate community of atomic, molecular, and optical science. Understanding of chiral, or ?handed? molecules play an important role in areas as diverse as astrobiology, pharmacology, and basic physics. This work holds the promise of providing new analytical tools for biological and materials research, and for industry. In addition to its broader scientific implications, this work will have a significant educational component. The project will educate graduate, undergraduate and high school students as well as recruit members of under-represented groups to science. The experiments with chiral molecules and their connection to astrobiological issues make an excellent topic for talks that will be given regularly to high school and civic groups, and serve to illustrate the beauty of basic physics to a large lay audience.

这个项目涉及到极化电子或极化光子与手征，或？手？分子和简单的双原子分子。所提出的实验解决了有关电子/光子分子散射动力学的物理问题，特别是关于自旋相关效应和角动量的碰撞分布。它们还将为需要基本电子-分子和光子-分子散射截面知识的应用提供重要信息，包括工业和天体物理等离子体建模。 还将开发改进的极化电子源和分析器。 后者的工作有望为生物和材料研究以及工业提供新的分析工具。 实验还将探索何时产生效果？环形？光，即具有轨道和自旋角动量的光，电离手性分子。这些实验将产生超出原子，分子和光学科学的直接社区的影响。 理解手性，还是？手？分子在天体生物学、药理学和基础物理学等不同领域都发挥着重要作用。这项工作有望为生物和材料研究以及工业提供新的分析工具。 除了更广泛的科学影响外，这项工作还将具有重要的教育意义。 该项目将教育研究生、本科生和高中生，并招募代表性不足的群体的成员从事科学研究。 手性分子的实验及其与天体生物学问题的联系是一个很好的话题，将定期给高中和民间团体，并有助于说明基础物理学的美丽，以大量的外行观众。