Title: Electron energy loss and angular asymmetry induced by elastic scattering in superfluid helium nanodroplets
Authors: Jakob D. Asmussen, Keshav Sishodi, Björn Bastian, Abdul R. Abid, Ltaief Ben Ltaief, Henrik B. Pedersen, Subhendu De, Cristian Medina, Nitish Pal, Robert Richter, Thomas Fennel, Sivarama Krishnan and Marcel Mudrich
DOI: https://doi.org/10.1039/D3NR03295G
Date: 08/03/2023
Working Group: WG4
Grant Period: GP1
Grant Period Goal (number): 4.2.2 Energy transfer and collective effects with the potential of enhancing conversion efficiency.
Covered deliverables from the MoU (number): 4.2.2 Energy transfer and collective effects with the potential of enhancing conversion efficiency.
Countries involved: Danmark, India, Germany, Italy
Number of female/young/ITC coauthors: 8
Abstract: Helium nanodroplets are ideal model systems to unravel the complex interaction of condensed matter with ionizing radiation. Here we study the effect of purely elastic electron scattering on angular and energy distributions of photoelectrons emitted from He nanodroplets of variable size (10–10^9 atoms per droplets). For large droplets, photoelectrons develop a pronounced anisotropy along the incident light beam due to a shadowing effect within the droplets. In contrast, the detected photoelectron spectra are only weakly perturbed. This opens up possibilities for photoelectron spectroscopy of dopants embedded in droplets provided they are smaller than the penetration depth of the light and the trapping range of emitted electrons in liquid helium.
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