Positron and Positronium Collisions with Simple Atoms

在理论原子物理领域将进行两个项目。第一个项目涉及使用一种公认的方法来研究外来原子正电子(Ps)与常规原子氢(H)和锂(Li)的低能散射。这个项目很有意义，因为Ps-H散射是一个基本的四体库仑过程，而ps-Li散射是一个有效的四体库仑过程。一名研究生将为他的博士论文做这个项目。该项目涉及与英国伦敦的彼得·范里斯博士的国际合作。第二个项目涉及寻找正电子-氢电离的涡旋。这是及时的，因为最近解释了以前未解释的氦电子碰撞电离结果中的最小值，以及正电子反应显微镜的发展。该项目是与田纳西大学诺克斯维尔分校的约瑟夫·马切克博士和塞尔日·奥夫钦尼科夫博士合作的。正电子散射在天体物理、生物物理和凝聚态物质中都有应用，而涡旋在流体动力学、天体物理学、凝聚态物质和非线性动力学等许多物理领域中都是重要的。计划通过出版、在国家会议和国际会议上介绍成果。为了让研究生广泛接触基于探究的教学方法和其他教学方法，研究生将协助北得克萨斯州教学(TNT)，这是北德克萨斯大学的一个项目，旨在培养未来的中学数学和科学教师。TNT开发的新方案特点将在有关教师为科学和数学做准备的会议上传播。

Two projects are to be performed in the area of theoretical atomic physics. The first project involves using a well established method to study low-energy scattering of an exotic atom, positronium (Ps), from the conventional atoms hydrogen (H) and lithium (Li). This project is of interest since Ps-H scattering is a fundamental four-body Coulomb process and Ps-Li scattering is an effective four-body Coulomb process. A graduate student will work on the project for his Ph. D. dissertation. The project involves an international collaboration with Dr. Peter Van Reeth, who is in London, UK. The second project concerns the search of vortices for positron-hydrogen ionization. It is timely due to the recent explanation of the previously unexplained minimum in results for electron-impact ionization of helium and the development of positron reaction microscopes. The project is in collaboration with Dr. Joseph Macek and Dr. Serge Ovchinnikov who are at the University of Tennessee, Knoxville.Positronium scattering has applications in astrophysics, biophysics and condensed matter and vortices are important in many fields of physics such as fluid dynamics, astrophysics, condensed matter and nonlinear dynamics. The plan is to present results through publication, at national conferences and at an international conference. To provide the graduate student a broad exposure to inquiry-based and other pedagogical methods, the graduate student will assist Teach North Texas (TNT), a program at UNT that prepares future secondary mathematics and science teachers. Novel program features developed by TNT will be disseminated at conferences concerning teacher preparation for science and mathematics.