The Interaction of Radiation With Free and Confined Atoms and Ions

辐射与自由和受限原子和离子的相互作用

• 批准号: 0852786
• 负责人: Steven Manson
• 金额: $ 15.06万
• 依托单位: Georgia State University Research Foundation, Inc.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0852786&HistoricalAwards=false
• 关键词: Interaction; Radiation; Free; Confined; Atoms

This project will aid the theoretical program on the interaction of radiation with free and confined atoms and ions at Georgia State University. The PI will continue to develop theoretical methodologies and perform a series of calculations that explore ionizing collisions of electromagnetic radiation and charged particles with matter and investigate the details of their deposition of energy. The PI will develop/enhance theoretical methodologies and apply them to investigations of electromagnetic radiation impinging on free atoms and ions, with emphasis on breakdowns in fundamental approximations and processes for which many-body interactions dominate, e.g., negative ion photodetachment. In addition, the PI will study the collisions of atoms and ions with atoms with particular emphases on the role of projectile electrons and higher order contributions. All of these investigations shall be carried out in close collaboration with experimental groups in an effort to insure the quantitative accuracy of the theoretical methodologies developed. In addition, the PI will continue to study the interaction of radiation with confined atoms and ions, e.g., confined in fullerenes. Of great importance will be the realistic handling of the confining potential, e.g., treating all 60 carbon atoms of C60. The results will provide further insight into the nature of these fundamental atomic processes that are of importance in plasma physics and controlled thermonuclear research, atmospheric, solar, and astrophysics, radiation and radiological physics and therapy, and for studies of x-ray laser mechanics. In addition, understanding the properties of confined atoms will lead to insight into the qualitatively new physics of a largely unexplored area. The project will bring more minorities in the sciences.

该项目将有助于佐治亚州立大学关于辐射与自由和受限原子和离子相互作用的理论项目。 PI 将继续开发理论方法并进行一系列计算，探索电磁辐射和带电粒子与物质的电离碰撞，并研究其能量沉积的细节。 PI将开发/增强理论方法，并将其应用于对撞击自由原子和离子的电磁辐射的研究，重点是多体相互作用占主导地位的基本近似和过程的崩溃，例如负离子光脱离。此外，PI还将研究原子和离子与原子的碰撞，特别强调射弹电子的作用和高阶贡献。所有这些研究都应与实验组密切合作进行，以确保所开发的理论方法的定量准确性。此外，PI 将继续研究辐射与受限原子和离子（例如富勒烯中受限原子和离子）的相互作用。非常重要的是对限制势的实际处理，例如处理 C60 的所有 60 个碳原子。研究结果将进一步深入了解这些基本原子过程的本质，这些过程对于等离子体物理学和受控热核研究、大气、太阳和天体物理学、辐射和放射物理与治疗以及 X 射线激光力学的研究具有重要意义。此外，了解受限原子的性质将有助于深入了解很大程度上未经探索的领域的新质物理。该项目将吸引更多的少数族裔进入科学领域。