Vortex rings in the ionization of atoms by positron impact

30th International Conference on Photonic, Electronic, and Atomic Collisions

Navarrete, F.^1,2 ; Barrachina, R.O.^1,2

Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica and Universidad Nacional de Cuyo, Avda. Bustillo 9500, Bariloche, Argentina^1

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina^2

关键词: Closed structures;    Ionization of atoms;    Momentum spaces;    Positron impacts;    Quantum vortex;    Three dimensions;    Vortex rings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/6/052019/pdf
DOI  :  10.1088/1742-6596/875/6/052019

来源: IOP

【 摘 要 】

Synopsis We uncovered the morphology of quantum vortex structures in positron-atom ionization collisions. By performing an exhaustive calculation of the position of vortices in the final momentum space of the problem with only one kinematic restriction, we could elucidate that quantum vortices form a closed structure, which is one of the two possible scenarios for their emergence in three dimensions. This is the first time that these structures are fully calculated for positron-atom collisions.