Krypton fine structure in perpendicular-plane electron-impact ionization

The dynamics of the outgoing electrons, from the separated fine-structure ionic states of the 4p valence shell of krypton atoms, are observed for the single ionization process by incident electrons with energies from 5 to 50 eV above threshold. Triple differential (e,2e) ionization cross sections ar...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2005-05, Vol.71 (5), Article 052709
Main Authors: Williams, J. F., van Boeyen, R. W., Samarin, S.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ATOMS
ELECTRON-ATOM COLLISIONS
ELECTRONS
EV RANGE
FINE STRUCTURE
GEOMETRY
HELIUM
IONIZATION
KRYPTON
SCATTERING
VALENCE
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Summary:The dynamics of the outgoing electrons, from the separated fine-structure ionic states of the 4p valence shell of krypton atoms, are observed for the single ionization process by incident electrons with energies from 5 to 50 eV above threshold. Triple differential (e,2e) ionization cross sections are deduced from observations made in the 'perpendicular-plane' scattering geometry using the same toroidal electrostatic electron energy analyzer for both outgoing electrons. For equal energy outgoing electrons, single and double scattering mechanisms account for the major characteristics of the cross sections. The double scattering becoming increasingly dominant as the excess energy increases; the behavior otherwise is very different from helium.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.71.052709