Ionization of Atomic Hydrogen and Helium by Low Energy Antiprotons

低能反质子对原子氢和氦的电离

• 批准号: EP/F033885/1
• 负责人: Mike Charlton
• 金额: $ 0.21万
• 依托单位: Swansea University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF033885%2F1
• 关键词: Ionization; Atomic; Hydrogen; Helium; Low

Experimental studies of collision processes, in which fundamental charged particles ionize simple atoms and molecules, provide the data necessary for our understanding of the many-body interaction and the development a theoretical description of this fundamental yet unsolved problem in collision dynamics. The ionization process plays an important role in astrophysical and technological plasmas and in the dissociation of molecules in the Earth's atmosphere. A comparison of single and multiple ionization of simple atomic and molecular targets by equi-velocity protons, electrons and their corresponding antiproton and positron antiparticles makes it possible to determine the effects of projectile mass and charge. The separation of 'pure' ionization from electron capture or transfer ionization processes can be studied in the special case of antiprotons colliding with light atoms. The absence of electron transfer is a significant simplification and the mass of the projectile enables straight-line trajectories models to be used.

碰撞过程是基本带电粒子电离简单原子和分子的过程，碰撞过程的实验研究为我们理解多体相互作用提供了必要的数据，并为碰撞动力学中这个基本但尚未解决的问题提供了理论描述。电离过程在天体物理和技术等离子体以及地球大气层中分子的解离中发挥着重要作用。通过比较等速质子、电子及其对应的反质子和正电子反粒子对简单原子和分子靶单电离和多次电离的影响，可以确定入射质量和电荷的影响。在反质子与轻原子碰撞的特殊情况下，可以研究“纯”电离与电子俘获或转移电离过程的分离。没有电子转移是一个显著的简化，而且弹丸的质量使得可以使用直线轨迹模型。

项目成果

The Gbar project, or how does antimatter fall?

Gbar项目，或者说反物质是如何坠落的？

• DOI: 10.1007/s10751-014-1019-6
• 发表时间: 2014
• 期刊: Hyperfine Interactions
• 作者: Indelicato P

The role of antihydrogen formation in the radial transport of antiprotons in positron plasmas

反氢形成在正电子等离子体中反质子径向传输中的作用

• DOI: 10.1088/0953-4075/49/13/134004
• 发表时间: 2016
• 期刊: Atomic, Molecular and Optical Physics
• 作者: Jonsell S

Heating due to momentum transfer in low-energy positronium-antiproton scattering

• DOI: 10.1103/physreva.94.032701
• 发表时间: 2016-09-06
• 期刊: PHYSICAL REVIEW A
• 影响因子: 2.9
• 作者: Charlton, M.;Kadyrov, A. S.;Bray, I.
• 通讯作者: Bray, I.