# Inelastic scattering of photoelectrons from He nanodroplets

## TL;DR

This study investigates inelastic energy-loss collisions of photoelectrons emitted from helium nanodroplets under XUV radiation, revealing complex electron interactions and the significance of inelastic scattering in nanoparticle-XUV interactions.

## Contribution

It provides detailed experimental insights into inelastic electron scattering processes in helium nanodroplets using coincidence imaging detection.

## Key findings

- Detection of photoelectrons from free He atoms and droplets
- Observation of electron impact excitation/ionization in He droplet pairs
- Highlighting the role of inelastic scattering in nanoparticle interactions

## Abstract

We present a detailed study of inelastic energy-loss collisions of photoelectrons emitted from He nanodroplets by tunable extreme ultraviolet (XUV) radiation. Using coincidence imaging detection of electrons and ions, we probe the lowest He droplet excited states up to the electron impact ionization threshold. We find significant signal contributions from photoelectrons emitted from free He atoms accompanying the He nanodroplet beam. Furthermore, signal contributions from photoionization and electron impact excitation/ionization occurring in pairs of nearest-neighbor atoms in the He droplets are detected. This work highlights the importance of inelastic electron scattering in the interaction of nanoparticles with XUV radiation.