反氢离子 $$bar\{textrm{H}}\textrm{Ps}^+$ 与正电子原子 Ps 的低能量 5 体碰撞中正电子反氢化物分子 ( $$bar\{textrm{H}}\textrm{Ps}$ 的形成

IF 1.7 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Few-Body Systems Pub Date : 2024-08-19 DOI:10.1007/s00601-024-01952-y

Piotr Froelich, Takuma Yamashita, Yasushi Kino, Svante Jonsell, Emiko Hiyama

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引用次数: 0

摘要

在本文中，我们首次对反氢离子与正电子原子的五体散射的弹性和非弹性截面进行了试验性计算。这些截面以前从未计算过，也不为实验所知。我们尤其关注碰撞重排反应（\bar{\mathrm H}}^+ + \textrm{Ps}\rightarrow {\bar{\textrm{H}}}\textrm{Ps}+{mathrm{e^+}} ），这些离子会消耗掉 \（\bar\textrm{H}}^+）离子，并产生稳定的原子分子。为了更好地理解这种重排的机理，我们研究了重排碰撞初始和最终状态下3体和4体碎片的三维角度解析正电子密度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Formation of the Positronium Antihydride Molecules ($\bar{\textrm{H}}\textrm{Ps}$) in Low Energy, 5-Body Collisions of Antihydrogen Ion $\bar{\textrm{H}}^+$ with Positronium Atoms Ps$

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Formation of the Positronium Antihydride Molecules ($\bar{\textrm{H}}\textrm{Ps}$) in Low Energy, 5-Body Collisions of Antihydrogen Ion $\bar{\textrm{H}}^+$ with Positronium Atoms Ps

In this paper we present the first pilot calculation of the elastic and inelastic cross sections for the 5-body scattering of antihydrogen ions with positronium atoms. These cross sections have not been calculated before and are not known experimentally. In particular, we focus on the collisional rearrangement reactions $\bar{{ \mathrm H}}^+ + \textrm{Ps} \rightarrow {\bar{\textrm{H}}}\textrm{Ps} +{\mathrm{e^+}}$ which deplete the $\bar{\textrm{H}}^+$ ions and result in stable atomcules $\bar{\textrm{H}}\textrm{Ps}$. To better understand the mechanism of this rearrangement, we study the 3-dimensional, angle resolved positron densities of the 3- and 4-body fragments in the initial and final states of the rearrangement collision.

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来源期刊

Few-Body Systems 物理-物理：综合

CiteScore

2.90

自引率

18.80%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Few-Body Systems presents original research work – experimental, theoretical and computational – investigating the behavior of any classical or quantum system consisting of a small number of well-defined constituent structures. The focus is on the research methods, properties, and results characteristic of few-body systems. Examples of few-body systems range from few-quark states, light nuclear and hadronic systems; few-electron atomic systems and small molecules; and specific systems in condensed matter and surface physics (such as quantum dots and highly correlated trapped systems), up to and including large-scale celestial structures. Systems for which an equivalent one-body description is available or can be designed, and large systems for which specific many-body methods are needed are outside the scope of the journal. The journal is devoted to the publication of all aspects of few-body systems research and applications. While concentrating on few-body systems well-suited to rigorous solutions, the journal also encourages interdisciplinary contributions that foster common approaches and insights, introduce and benchmark the use of novel tools (e.g. machine learning) and develop relevant applications (e.g. few-body aspects in quantum technologies).