Many-electron dynamics of heavy atoms in intense laser fields : Effects of screening and correlation
Wendin, Göran ; Jönsson, Lars and L’huillier, Anne LU
(1987)
In Journal of the Optical Society of America B: Optical Physics
4(5).
p.833-846
- Abstract
We discuss the role of many-electron interactions in multiphoton multielectron ionization of heavy atoms and try to indicate the relative importance of collective effects and screening, relaxation and shakeup, and Fermi sea correlations. The purpose of the work is to look for approximations in which the photoemission processes have been renormalized in consistent ways with respect to the field and the electron-electron interaction. This involves effective shift and broadening of energy levels, effective matrix elements for ionization by the field, effective fieldinduced density of states for the photoelectron, etc. In an application, we consider the low-intensity limit and discuss two-photon one-electron ionization of the 5p shell of Xe... (More)
We discuss the role of many-electron interactions in multiphoton multielectron ionization of heavy atoms and try to indicate the relative importance of collective effects and screening, relaxation and shakeup, and Fermi sea correlations. The purpose of the work is to look for approximations in which the photoemission processes have been renormalized in consistent ways with respect to the field and the electron-electron interaction. This involves effective shift and broadening of energy levels, effective matrix elements for ionization by the field, effective fieldinduced density of states for the photoelectron, etc. In an application, we consider the low-intensity limit and discuss two-photon one-electron ionization of the 5p shell of Xe using a zero-field atomic basis set. This calculation demonstrates important ways in which collective effects may enter, and it also represents the first reported calculation of its kind. Finally, we apply the scheme for dressing the many-electron processes to a discussion of time scales in two-step double ionization, introducing the laser pulse duration in an intuitive way.
(Less)
- author
- Wendin, Göran
; Jönsson, Lars
and L’huillier, Anne
LU
- publishing date
- 1987
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the Optical Society of America B: Optical Physics
- volume
- 4
- issue
- 5
- pages
- 14 pages
- publisher
- Optical Society of America
- external identifiers
-
- scopus:84975542117
- ISSN
- 0740-3224
- DOI
- 10.1364/JOSAB.4.000833
- language
- English
- LU publication?
- no
- id
- 88da5738-7596-409d-9c81-0d18fcb3a1d5
- date added to LUP
- 2019-05-22 17:35:59
- date last changed
- 2021-01-03 03:03:25
@article{88da5738-7596-409d-9c81-0d18fcb3a1d5,
abstract = {{<p>We discuss the role of many-electron interactions in multiphoton multielectron ionization of heavy atoms and try to indicate the relative importance of collective effects and screening, relaxation and shakeup, and Fermi sea correlations. The purpose of the work is to look for approximations in which the photoemission processes have been renormalized in consistent ways with respect to the field and the electron-electron interaction. This involves effective shift and broadening of energy levels, effective matrix elements for ionization by the field, effective fieldinduced density of states for the photoelectron, etc. In an application, we consider the low-intensity limit and discuss two-photon one-electron ionization of the 5p shell of Xe using a zero-field atomic basis set. This calculation demonstrates important ways in which collective effects may enter, and it also represents the first reported calculation of its kind. Finally, we apply the scheme for dressing the many-electron processes to a discussion of time scales in two-step double ionization, introducing the laser pulse duration in an intuitive way.</p>}},
author = {{Wendin, Göran and Jönsson, Lars and L’huillier, Anne}},
issn = {{0740-3224}},
language = {{eng}},
number = {{5}},
pages = {{833--846}},
publisher = {{Optical Society of America}},
series = {{Journal of the Optical Society of America B: Optical Physics}},
title = {{Many-electron dynamics of heavy atoms in intense laser fields : Effects of screening and correlation}},
url = {{http://dx.doi.org/10.1364/JOSAB.4.000833}},
doi = {{10.1364/JOSAB.4.000833}},
volume = {{4}},
year = {{1987}},
}