The Structure of Triply Excited, Negative-Ion Resonances in the Autoionizing Region of Helium
Date
1999
Authors
Trantham, K W
Rau, A R P
Buckman, Stephen
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Physics Publishing
Abstract
The formation and decay of the two lowest-lying, triply excited He- resonances in the autoionizing region of the helium spectrum (57-60 eV) have been studied by measuring electron-impact excitation functions for the n = 2 singly excited states of helium as a function of electron scattering angle. These results offer unambiguous confirmation of the classification of these states as He- 2s 2p22P and 2s2p22D, respectively. Furthermore, the observation of the relative strengths of the decay of these features into the various final states enables some speculation as to the structure of the three excited electrons.
Description
Keywords
Keywords: Autoionizaton; Electron-impact excitation; Electron energy levels; Electron resonance; Electron scattering; Electron transitions; Functions; Ionization; Helium
Citation
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Source
Journal of Physics B: Atomic, Molecular and Optical Physics
Type
Journal article