skip to main content

SciTech ConnectSciTech Connect

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

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{sup +}, He{sub 2}{sup +}, and He{sub 3}{sup +}. 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.
Authors:
; ;  [1] ; ;  [2] ; ;  [3] ; ;  [4] ;  [5] ;  [6] ; ; ;  [7] ;  [2] ;  [8]
  1. Physikalisches Institut, Universität Freiburg, 79104 Freiburg (Germany)
  2. Max-Planck-Institut für Kernphysik, 69117 Heidelberg (Germany)
  3. Laboratoire de Chimie Physique Moléculaire, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne (Switzerland)
  4. CNR Istituto di Metodologie Inorganiche e dei Plasmi, CP10, 00016 Monterotondo Scalo (Italy)
  5. CIMAINA and Dipartimento di Fisica, Università di Milano, 20133 Milano (Italy)
  6. Department of Physics, University of Trieste, 34128 Trieste (Italy)
  7. Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste (Italy)
  8. (PTB), Bundesallee 100, D-38116 Braunschweig (Germany)
Publication Date:
OSTI Identifier:
22224158
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 139; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR DISTRIBUTION; AUTOIONIZATION; DROPLETS; ENERGY SPECTRA; ENERGY-LOSS SPECTROSCOPY; EXTREME ULTRAVIOLET RADIATION; HELIUM IONS; IRRADIATION; PHOTOELECTRON SPECTROSCOPY; PHOTOIONIZATION; PHOTON-ATOM COLLISIONS