论文标题
弹丸横向动量控制电子涡流电离碰撞中的发射
Projectile Transverse Momentum Controls Emission in Electron Vortex Ionization Collisions
论文作者
论文摘要
在过去的十年中，电子涡流梁的实现导致了从电子显微镜从电子显微镜进行控制和操纵单个分子的田地中的许多应用。然而，尽管电子涡流梁（例如横向动量和量化轨道角动量）具有许多独特的特征和有希望的优势，但对它们与原子尺度上物质的基本相互作用的理解仍然有限。电子涡流弹丸与原子靶标之间的碰撞可以提供对这些相互作用的一些见识，我们在这里提出了使用电子涡流弹丸的激发状态原子氢靶标电离的完全差异横截面。我们表明，与非涡流弹丸相比，弹丸的横向动量会导致电离电子角分布发生变化，并且可以通过调整涡流开头的调整来控制电离电子的弹射角，这是涡流弹丸所独有的功能。此外，弹丸的动量转移的固有不确定性导致经典二进制峰的扩大，使目标电子密度的特征更容易观察到。对齐2P目标的完全差异横截面显示可用于确定比对的结构。
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.
