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Electron correlation effects in the double ionization of He

Lappas, D. G and van Leeuwen, R (1998) In Journal of Physics B: Atomic, Molecular and Optical Physics 31(6).
Abstract
The double-ionization yield of He is calculated with a one-dimensional fully correlated two-electron model for the low laser frequency of recent experiments. Results for a higher laser frequency also indicate a comparable very high double-ionization yield for sufficiently short pulses. It is shown that the Hartree-Fock approximation fails dramatically in describing the two-electron dynamics. Also, in a density functional theory approach, we demonstrate the need for an improved exchange correlation potential and for more accurate density functionals for the ionization probabilities.
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physics B: Atomic, Molecular and Optical Physics
volume
31
issue
6
publisher
IOP Publishing
external identifiers
  • scopus:0032027921
ISSN
0953-4075
DOI
10.1088/0953-4075/31/6/001
language
English
LU publication?
no
id
5f0b0bbe-db63-4b5b-ac51-f7bf2f5e038f (old id 2258694)
date added to LUP
2012-02-18 13:54:53
date last changed
2017-07-23 04:59:29
@article{5f0b0bbe-db63-4b5b-ac51-f7bf2f5e038f,
  abstract     = {The double-ionization yield of He is calculated with a one-dimensional fully correlated two-electron model for the low laser frequency of recent experiments. Results for a higher laser frequency also indicate a comparable very high double-ionization yield for sufficiently short pulses. It is shown that the Hartree-Fock approximation fails dramatically in describing the two-electron dynamics. Also, in a density functional theory approach, we demonstrate the need for an improved exchange correlation potential and for more accurate density functionals for the ionization probabilities.},
  author       = {Lappas, D. G and van Leeuwen, R},
  issn         = {0953-4075},
  language     = {eng},
  number       = {6},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics B: Atomic, Molecular and Optical Physics},
  title        = {Electron correlation effects in the double ionization of He},
  url          = {http://dx.doi.org/10.1088/0953-4075/31/6/001},
  volume       = {31},
  year         = {1998},
}