Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 139, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4818531
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Funding
- Deutsche Forschungsgemeinschaft
- Swiss National Science Foundation [200020_140396]
- Swiss National Science Foundation (SNF) [200020_140396] Funding Source: Swiss National Science Foundation (SNF)
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The ionization dynamics of pure He nanodroplets irradiated by Extreme ultraviolet radiation is studied using Velocity-Map Imaging PhotoElectron-PhotoIon COincidence spectroscopy. We present photoelectron energy spectra and angular distributions measured in coincidence with the most abundant ions He+, He-2(+), and He-3(+). Surprisingly, below the autoionization threshold of He droplets, we find indications for multiple excitation and subsequent ionization of the droplets by a Penning-like process. At high photon energies we observe inelastic collisions of photoelectrons with the surrounding He atoms in the droplets. (C) 2013 AIP Publishing LLC.
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