Electron-impact ionization cross sections out of the ground and 6^{2}P excited states of cesium

M. Łukomski; S. Sutton; W. Kedzierski; T. Reddish; K. Bartschat; P. Bartlett; I. Bray; A. Stelbovics; J. McConkey

doi:10.1103/PhysRevA.74.032708

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$Electron-impact ionization cross sections out of the ground and 6^{2}P excited states of cesium$

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Electron-impact ionization cross sections out of the ground and 6^{2}P excited states of cesium

M. Łukomski, S. Sutton, W. Kedzierski, T. Reddish, K. Bartschat, P. Bartlett, I. Bray, A. Stelbovics and J. McConkey

Physical Review A - Atomic, Molecular, and Optical Physics, Vol.74(3)

2006

DOI: https://doi.org/10.1103/PhysRevA.74.032708

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Abstract

An atom trapping technique for determining absolute, total ionization cross sections (TICS) out of an excited atom is presented. The unique feature of our method is in utilizing Doppler cooling of neutral atoms to determine ionization cross sections. This fluorescence-monitoring experiment, which is a variant of the “trap loss” technique, has enabled us to obtain the experimental electron impact ionization cross sections out of the Cs 6 2P3∕2 state between 7 eV and 400 eV. CCC, RMPS, and Born theoretical results are also presented for both the ground and excited states of cesium and rubidium. In the low energy region (<11 eV) where best agreement between these excited state measurements and theory might be expected, a discrepancy of approximately a factor of five is observed. Above this energy there are significant contributions to the TICS from both autoionization and multiple ionization.

Details

Title: Electron-impact ionization cross sections out of the ground and 6^{2}P excited states of cesium
Authors/Creators: M. Łukomski (Author/Creator)
S. Sutton (Author/Creator)
W. Kedzierski (Author/Creator)
T. Reddish (Author/Creator)
K. Bartschat (Author/Creator)
P. Bartlett (Author/Creator)
I. Bray (Author/Creator)
A. Stelbovics (Author/Creator)
J. McConkey (Author/Creator)
Publication Details: Physical Review A - Atomic, Molecular, and Optical Physics, Vol.74(3)
Publisher: The American Physical Society
Identifiers: 991005544630807891
Copyright: © 2006 The American Physical Society
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 2 Chemistry; 2.15 Physical Chemistry; 2.15.664 Dissociative Electron Attachment
Web Of Science research areas: Optics; Physics, Atomic, Molecular & Chemical
ESI research areas: Physics