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arXiv 2007.11670physics.atom-ph
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电子涡旋电离碰撞中射弹横动量对辐射的控制

Projectile Transverse Momentum Controls Emission in Electron Vortex Ionization Collisions

A. Plumadore, A. L. Harris

摘要:

在过去的十年中,电子涡旋束的实现导致了从电子显微镜到单个分子的控制和操纵等领域的许多拟议应用。然而,尽管电子涡旋束有许多独特的特性和有前途的优势,如横向动量和量子化轨道角动量,仍然有一个有限的理解,他们的基本相互作用与物质在原子尺度上。电子涡旋射弹与原子靶的碰撞可以提供一些了解这些相互作用,我们在这里提出了全微分截面的激发态原子氢靶使用电子涡旋射弹电离。我们表明,弹丸的横向动量导致的电离电子的角分布被改变相比,非涡流弹丸和电离电子的喷射角可以通过调整的涡流开口角,独特的涡流弹丸的功能来控制。此外,在弹丸的动量转移的固有的不确定性,导致经典的二元峰加宽,使目标电子密度的签名更容易观察。对准的2p靶的全微分截面表现出可用于确定对准的结构。

英文摘要:

The realization of electron vortex beams in the past decade has led to numerous proposed applications in fields from electron microscopy to control and manipulation of individual molecules. Yet despite the many unique characteristics and promising advantages of electron vortex beams, such as transverse momentum and quantized orbital angular momentum, there remains a limited understanding of their fundamental interactions with matter at the atomic scale. Collisions between electron vortex projectiles and atomic targets can provide some insight into these interactions and we present here fully differential cross sections for ionization of excited state atomic hydrogen targets using electron vortex projectiles. We show that the projectile's transverse momentum causes the ionized electron angular distributions to be altered compared to non-vortex projectiles and that the ionized electron's ejection angle can be controlled by adjustment of the vortex opening angle, a feature unique to vortex projectiles. Additionally, an inherent uncertainty in the projectile's momentum transfer leads to a broadening of the classical binary peak, making signatures of the target electron density more readily observable. Fully differential cross sections for aligned 2p targets exhibit structures that can be used to determine the alignment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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