The Interaction of Radiation With Free and Confined Atoms and Ions

该项目将帮助佐治亚州立大学研究辐射与自由和受限原子和离子相互作用的理论项目。PI将继续发展理论方法，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将发展/加强理论方法，并将其应用于电磁辐射撞击自由原子和离子的研究，重点是在基本近似和多体相互作用占主导地位的过程中的分解，例如负离子光剥离。此外，PI将研究原子和离子与原子的碰撞，特别强调抛射电子的作用和高阶贡献。所有这些调查都应与实验小组密切合作进行，以努力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的相互作用，例如受限在富勒烯中的原子和离子。对限制势的实际处理将是非常重要的，例如，处理C60的所有60个碳原子。这些结果将进一步深入了解这些基本原子过程的本质，这些过程在等离子体物理学和受控热核研究、大气、太阳和天体物理学、辐射和放射物理学和治疗以及x射线激光力学研究中具有重要意义。此外，了解受约束原子的性质将导致对一个很大程度上未开发领域的定性新物理学的深入了解。该项目将使更多的少数民族进入科学领域。

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.