氦扭曲电子电离中的抛射相干效应

IF 1.7 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
Atoms Pub Date : 2023-05-03 DOI:10.3390/atoms11050079
A. Harris
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引用次数: 1

摘要

在过去的十年里,很明显,对于重离子射弹,理论模型中必须考虑射弹的横向相干长度。虽然传统的散射理论通常假设射弹具有无限相干长度,但许多研究表明,即使射弹与目标的相互作用处于微扰状态,也不能忽视射弹相干的影响。这导致了研究抛射物相干长度影响的研究激增。重离子碰撞特别适合这种情况,因为抛射物的动量可能很大,导致德布罗意波长很小。相反,具有较大德布罗意波长和相干效应的电子射弹通常可以被安全地忽略。然而,最近雕刻的电子波包的演示为研究电子碰撞中的射弹相干效应打开了大门。本文报道了利用贝塞尔和拉盖尔-高斯射弹对氦进行电子碰撞电离的理论三微分截面(TDCS)。我们表明,射弹的横向相干长度影响TDCS的形状和大小,原子目标在射弹束中的位置对电离概率起着重要作用。我们还证明,具有大相干长度的射弹的横截面与完全相干的射弹更相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Projectile Coherence Effects in Twisted Electron Ionization of Helium
Over the last decade, it has become clear that for heavy ion projectiles, the projectile’s transverse coherence length must be considered in theoretical models. While traditional scattering theory often assumes that the projectile has an infinite coherence length, many studies have demonstrated that the effect of projectile coherence cannot be ignored, even when the projectile-target interaction is within the perturbative regime. This has led to a surge in studies that examine the effects of the projectile’s coherence length. Heavy-ion collisions are particularly well-suited to this because the projectile’s momentum can be large, leading to a small deBroglie wavelength. In contrast, electron projectiles that have larger deBroglie wavelengths and coherence effects can usually be safely ignored. However, the recent demonstration of sculpted electron wave packets opens the door to studying projectile coherence effects in electron-impact collisions. We report here theoretical triple differential cross-sections (TDCSs) for the electron-impact ionization of helium using Bessel and Laguerre-Gauss projectiles. We show that the projectile’s transverse coherence length affects the shape and magnitude of the TDCSs and that the atomic target’s position within the projectile beam plays a significant role in the probability of ionization. We also demonstrate that projectiles with large coherence lengths result in cross-sections that more closely resemble their fully coherent counterparts.
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来源期刊
Atoms
Atoms Physics and Astronomy-Nuclear and High Energy Physics
CiteScore
2.70
自引率
22.20%
发文量
128
审稿时长
8 weeks
期刊介绍: Atoms (ISSN 2218-2004) is an international and cross-disciplinary scholarly journal of scientific studies related to all aspects of the atom. It publishes reviews, regular research papers, and communications; there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles. There are, in addition, unique features of this journal: -manuscripts regarding research proposals and research ideas will be particularly welcomed. -computed data, program listings, and files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Scopes: -experimental and theoretical atomic, molecular, and nuclear physics, chemical physics -the study of atoms, molecules, nuclei and their interactions and constituents (protons, neutrons, and electrons) -quantum theory, applications and foundations -microparticles, clusters -exotic systems (muons, quarks, anti-matter) -atomic, molecular, and nuclear spectroscopy and collisions -nuclear energy (fusion and fission), radioactive decay -nuclear magnetic resonance (NMR) and electron spin resonance (ESR), hyperfine interactions -orbitals, valence and bonding behavior -atomic and molecular properties (energy levels, radiative properties, magnetic moments, collisional data) and photon interactions
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