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Marcel Mudrich

Extreme ultraviolet ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization, and electron energy-loss spectra

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DOI

  • Dominic Buchta, Albert-Ludwigs-Universität Freiburg
  • ,
  • Siva Rama Krishnan, Max-Planck-Institut für Kernphysik, IBM-India Semiconductor R and D Center
  • ,
  • N. B. Brauer, École Polytechnique Fédérale de Lausanne
  • ,
  • M. Drabbels, École Polytechnique Fédérale de Lausanne
  • ,
  • P. O'Keeffe, Consiglio Nazionale delle Ricerche
  • ,
  • M. Devetta, Universita degli Studi di Milano
  • ,
  • Michele Di Fraia, Universita degli Studi di Trieste
  • ,
  • C. Callegari, Elettra-Sincrotrone Trieste S.C.p.A.
  • ,
  • R. Richter, Elettra-Sincrotrone Trieste S.C.p.A.
  • ,
  • M. Coreno, Consiglio Nazionale delle Ricerche
  • ,
  • Kevin C Prince, Elettra-Sincrotrone Trieste S.C.p.A.
  • ,
  • F. Stienkemeier, Albert-Ludwigs-Universität Freiburg
  • ,
  • J. Ullrich, Max-Planck-Institut für Kernphysik, Physikalisch-Technische Bundesanstalt
  • ,
  • R. Moshammer, Max-Planck-Institut für Kernphysik
  • ,
  • M. Mudrich

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.

OriginalsprogEngelsk
Artikelnummer084301
TidsskriftJournal of Chemical Physics
Vol/bind139
Nummer8
ISSN0021-9606
DOI
StatusUdgivet - 28 aug. 2013
Eksternt udgivetJa

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