EUV ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization and electron energy-loss spectra
Buchta, D.; Krishnan, S. R.; Brauer, Nils Benedict; Drabbels, Marcel; O'Keeffe, P.; Devetta, M.; Di Fraia, M.; Callegari, C.; Richter, R.; Coreno, M.; Prince, K. C.; Steinkemeier, F.; Moshammer, R.; Mudrich, M.
2013

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Abstract

The ionization dynamics of pure He nanodroplets irradiated by EUV radiation is studied using Velocity-Map Imaging PhotoElectron-PhotoIon COincidence (VMI-PEPICO) 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 evidence inelastic collisions of photoelectrons with the surrounding He atoms in the droplets.

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Title EUV ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization and electron energy-loss spectra
Author(s) Buchta, D. ; Krishnan, S. R. ; Brauer, Nils Benedict ; Drabbels, Marcel ; O'Keeffe, P. ; Devetta, M. ; Di Fraia, M. ; Callegari, C. ; Richter, R. ; Coreno, M. ; Prince, K. C. ; Steinkemeier, F. ; Moshammer, R. ; Mudrich, M.
Published in Journal of Chemical Physics
Pagination 10
Volume 139
Pages 084301
Date 2013
Publisher Melville, American Institute of Physics
ISSN 0021-9606
Keywords
DOI https://doi.org/10.1063/1.4818531
Other identifier(s) View record in Web of Science
Laboratories LCPM
Record Appears in Scientific production and competences > SB - School of Basic Sciences > ISIC - Institute of Chemical Sciences and Engineering > LCPM - Laboratory of Molecular Physical Chemistry
Peer-reviewed publications
Work outside EPFL
Journal Articles
Published
Record creation date 2013-06-23

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