Space charge and plasma effects in zero kinetic energy (ZEKE)photoelectron spectroscopy

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DOIResolve DOI: http://doi.org/10.1063/1.474241
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TypeArticle
Journal titleThe Journal Of Chemical Physics
Volume107
Issue14
Pages53105318; # of pages: 9
Subjectphotoelectron spectra; plasma interactions; plasma simulation; space charge
AbstractIn photoelectron spectroscopy experiments it is generally assumed that the Coulomb force between charged particles is small compared with external fields, and that the free kinetic electrons will quickly leave the ions. This is the basis of the ZEKE photoelectron spectroscopy. However as the density of charged particles is increased, plasma physics effects begin to become important, and the kinetic electrons become trapped by the net positive charge and move so as to set up a self-field which can cancel any externally imposed electric fields. For high densities, fewer electrons than expected are able to escape the self-field. The production of self-consistent electric fields is studied by means of particle-in-cell plasma simulations and by N-body trajectory calculations, and simple expressions are derived for when plasma physics effects become significant. An experimental illustration of plasma effects in ZEKE is presented.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
NPARC number12327637
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Record identifier68f3cf4a-2a91-483a-972f-27e6a3e99be3
Record created2009-09-10
Record modified2017-03-23
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