Head-on Collisions of Xe Atoms Against Superfluid \(^4\)He Nanodroplets
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We study the head-on collision of a heliophilic xenon atom with a superfluid \(^4\)He droplet made of 1000 atoms. At variance with the findings for a heliophobic cesium atom of a similar atomic weight, it is found that the xenon atom has to hit the droplet with a large kinetic energy in order to get across it without being captured. When it is not captured, the xenon impurity does not emerge as a bare atom; instead, due to its heliophilic character it carries away some helium atoms.
KeywordsSuperfluid \(^4\)He droplets Density functional theory Atomic collisions
This work has been performed under Grants No. FIS2014-52285-C2-1-P from DGI, Spain, and 2014SGR401 from Generalitat de Catalunya and using HPC resources from CALMIP (Grant P1039). AL has been supported by the ME (Spain) FPI program, Grant No. BES-2012-057439. MB thanks the Université Fédérale Toulouse Midi-Pyrénées for financial support through the “Chaires d’Attractivité 2014” Programme IMDYNHE.