Few-Body Dynamics of Atomic Reactions Induced by Particles and Anti-Particles

粒子和反粒子引起的原子反应的少体动力学

• 批准号: 0652519
• 负责人: Michael Schulz
• 金额: $ 55.75万
• 依托单位: Missouri University of Science and Technology
• 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: 2007-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0652519&HistoricalAwards=false
• 关键词: Few; Body; Dynamics; Atomic; Reactions

The experimental research program has the overall goal of exploring the dynamics of few-body systems. Atomic collisions are ideally suited this purpose because the underlying interactions are completely understood, while particle numbers can be small enough to make detailed complete measurements. In one aspect of this work, "kinematically complete" studies of ionizing collisions is studied by measuring the recoil momenta of all particles after a collision using a Cold Target Recoil Ion Mass Spectrometer (COLTRIMS). The PIs plan to study proton-hydrogen (p-H) collisions to provide stringent tests of three-body dynamics theories and then continue to hydrogen-hydrogen and proton-helium collision measurements (two different types of four-body systems). The goal of these experiments is to explore the correlation between the electrons and how this influences the collision. Another aspect of this work involves measuring and comparing electron and positron (anti-electron) impact ionization in far greater detail than previously possible. The goal here is to investigate differences which occur simply because the charge of one of particles is altered from positive to negative. In addition, these studies enhance our understanding of how antimatter interacts with matter.The broader impact of this work is in the areas of education of graduate students, undergraduates, and high-school students. In addition, understanding of few-body dynamics that come from these experiments will have an impact on other areas of physics where the underlying forces are not well understood.

实验研究计划的总体目标是探索少体系统的动力学。 原子碰撞非常适合这一目的，因为基本的相互作用已经完全理解，而粒子数量可以小到足以进行详细的完整测量。 在这项工作的一个方面，“运动学完整”的电离碰撞的研究进行了研究，通过测量碰撞后的所有粒子的反冲动量使用冷靶反冲离子质谱仪（COLTRIMS）。 PI计划研究质子-氢（p-H）碰撞，以提供三体动力学理论的严格测试，然后继续氢-氢和质子-氦碰撞测量（两种不同类型的四体系统）。 这些实验的目的是探索电子之间的相关性以及这如何影响碰撞。 这项工作的另一个方面涉及测量和比较电子和正电子（反电子）碰撞电离的细节比以前更可能。 这里的目标是研究仅仅因为其中一个粒子的电荷从正变为负而发生的差异。 此外，这些研究还增进了我们对反物质如何与物质相互作用的理解，并对研究生、本科生和高中生的教育产生了更广泛的影响。 此外，从这些实验中了解少体动力学将对物理学的其他领域产生影响，这些领域的基本力量还没有得到很好的理解。