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Doubly charged CO2 clusters formed by ionization of doped helium nanodroplets

Authors
  • Daxner, Matthias
  • Denifl, Stephan
  • Scheier, Paul
  • Echt, Olof1, 2
  • 1 Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck
  • 2 Department of Physics, University of New Hampshire
Type
Published Article
Journal
International Journal of Mass Spectrometry
Publisher
Elsevier BV
Publication Date
Jan 01, 2014
Accepted Date
Jan 22, 2014
Identifiers
DOI: 10.1016/j.ijms.2014.01.016
Source
Elsevier
Keywords
License
Unknown

Abstract

Helium nanodroplets are doped with carbon dioxide and ionized by electrons. Doubly charged cluster ions are, for the first time, identified based on their characteristic patterns of isotopologues. Thanks to the high mass resolution, large dynamic range, and a novel method to eliminate contributions from singly charged ions from the mass spectra, we are able to observe doubly charged cluster ions that are smaller than the ones reported in the past. The likely mechanism by which doubly charged ions are formed in doped helium droplets is discussed.

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