Coppens François, Ancilotto Francesco, Barranco Manuel, Halberstadt Nadine, Pi Martí
Université Toulouse 3 and CNRS, Laboratoire des Collisions, Agrégats et Réactivité, IRSAMC, 118 route de Narbonne, F-31062 Toulouse Cedex 09, France.
Dipartimento di Fisica e Astronomia "Galileo Galilei" and CNISM, Università di Padova, via Marzolo 8, 35122 Padova, Italy and CNR-IOM Democritos, via Bonomea, 265 - 34136 Trieste, Italy.
Phys Chem Chem Phys. 2019 Aug 21;21(31):17423-17432. doi: 10.1039/c9cp02789k. Epub 2019 Jul 30.
The capture of multiple impurities by He droplets is investigated using real time dynamics within the density functional approach applied to liquid helium. We study the case of two or six Ar atoms colliding with a He droplet either in its ground state or hosting a six-vortex array. Depending on initial kinematic conditions, two different Ar structures are found: either a compact, gas-phase like cluster, or a loosely bound metastable cluster with helium density caged inside. In the presence of the vortex array, the argon atoms are deflected by the superfluid flow, tending to orbit around the vortex cores. The Ar atoms end up being trapped together in a loosely bound structure attached to the central vortex core.
利用应用于液氦的密度泛函方法中的实时动力学，研究了氦滴对多种杂质的俘获。我们研究了两个或六个氩原子与处于基态或包含六涡旋阵列的氦滴碰撞的情况。根据初始运动学条件，发现了两种不同的氩结构：一种是紧凑的、类似气相的团簇，另一种是内部氦密度被囚禁的松散结合的亚稳团簇。在存在涡旋阵列的情况下，氩原子被超流流偏转，倾向于围绕涡旋核心轨道运动。氩原子最终被困在一起，形成附着在中心涡旋核心上的松散结合结构。
