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MCHF calculations of autoionization widths in two- and three-electron systems

Brage, Tomas LU ; Fischer, CF and Vaeck, N (1993) In Journal of Physics B: Atomic, Molecular and Optical Physics 26(4). p.621-640
Abstract
We present calculations of autoionization widths using a fully numerical multiconfigurational Hartree-Fock method (MCHF). Energy positions and autoionization rates are given for several doubly-excited states lying below the n = 2 threshold in He I and H-. Particular attention is given to orthogonality considerations in the computation of the autoionization widths. The method is extended to the 1s2p2 2D, 1s2s(3S)3d 2D and 1s2s(3S)4d 2D states of Li I. To the authors' knowledge, our MCHF value, 12.5 meV, is the first result obtained for the autoionization width of the 1s2s(3S)4d 2D state. Comparison is made with other theoretical results and with experimental values and we point out several inconsistencies between the two sets of results.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physics B: Atomic, Molecular and Optical Physics
volume
26
issue
4
pages
621 - 640
publisher
IOP Publishing
external identifiers
  • wos:A1993KR16000006
  • scopus:0006722112
ISSN
0953-4075
DOI
10.1088/0953-4075/26/4/006
language
English
LU publication?
yes
id
ebf8a37e-4fc8-4a5e-8029-c0a33b3301f8 (old id 3919048)
date added to LUP
2013-07-08 15:15:42
date last changed
2017-06-11 04:38:07
@article{ebf8a37e-4fc8-4a5e-8029-c0a33b3301f8,
  abstract     = {We present calculations of autoionization widths using a fully numerical multiconfigurational Hartree-Fock method (MCHF). Energy positions and autoionization rates are given for several doubly-excited states lying below the n = 2 threshold in He I and H-. Particular attention is given to orthogonality considerations in the computation of the autoionization widths. The method is extended to the 1s2p2 2D, 1s2s(3S)3d 2D and 1s2s(3S)4d 2D states of Li I. To the authors' knowledge, our MCHF value, 12.5 meV, is the first result obtained for the autoionization width of the 1s2s(3S)4d 2D state. Comparison is made with other theoretical results and with experimental values and we point out several inconsistencies between the two sets of results.},
  author       = {Brage, Tomas and Fischer, CF and Vaeck, N},
  issn         = {0953-4075},
  language     = {eng},
  number       = {4},
  pages        = {621--640},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics B: Atomic, Molecular and Optical Physics},
  title        = {MCHF calculations of autoionization widths in two- and three-electron systems},
  url          = {http://dx.doi.org/10.1088/0953-4075/26/4/006},
  volume       = {26},
  year         = {1993},
}