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Photoemission-time-delay measurements and calculations close to the 3s-ionization-cross-section minimum in Ar

Guenot, Diego LU ; Klünder, Kathrin LU ; Arnold, Cord LU ; Kroon, David LU ; Dahlstrom, J. M.; Miranda, Miguel LU ; Fordell, Thomas LU ; Gisselbrecht, Mathieu LU ; Johnsson, Per LU and Mauritsson, Johan LU , et al. (2012) In Physical Review A (Atomic, Molecular and Optical Physics) 85(5).
Abstract
We present experimental measurements and theoretical calculations of photoionization time delays from the 3s and 3p shells in Ar in the photon energy range of 32-42 eV. The experimental measurements are performed by interferometry using attosecond pulse trains and the infrared laser used for their generation. The theoretical approach includes intershell correlation effects between the 3s and 3p shells within the framework of the random-phase approximation with exchange. The connection between single-photon ionization and the two-color two-photon ionization process used in the measurement is established using the recently developed asymptotic approximation for the complex transition amplitudes of laser-assisted photoionization. We compare... (More)
We present experimental measurements and theoretical calculations of photoionization time delays from the 3s and 3p shells in Ar in the photon energy range of 32-42 eV. The experimental measurements are performed by interferometry using attosecond pulse trains and the infrared laser used for their generation. The theoretical approach includes intershell correlation effects between the 3s and 3p shells within the framework of the random-phase approximation with exchange. The connection between single-photon ionization and the two-color two-photon ionization process used in the measurement is established using the recently developed asymptotic approximation for the complex transition amplitudes of laser-assisted photoionization. We compare and discuss the theoretical and experimental results, especially in the region where strong intershell correlations in the 3s -> kp channel lead to an induced "Cooper" minimum in the 3s ionization cross section. (Less)
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type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
85
issue
5
publisher
American Physical Society (APS)
external identifiers
  • wos:000304645900004
  • scopus:84861820166
ISSN
1050-2947
DOI
10.1103/PhysRevA.85.053424
language
English
LU publication?
yes
id
e474d7b6-684c-4ae6-89ca-4aeb4b8e7628 (old id 2906886)
date added to LUP
2012-07-23 15:06:08
date last changed
2017-08-20 03:04:17
@article{e474d7b6-684c-4ae6-89ca-4aeb4b8e7628,
  abstract     = {We present experimental measurements and theoretical calculations of photoionization time delays from the 3s and 3p shells in Ar in the photon energy range of 32-42 eV. The experimental measurements are performed by interferometry using attosecond pulse trains and the infrared laser used for their generation. The theoretical approach includes intershell correlation effects between the 3s and 3p shells within the framework of the random-phase approximation with exchange. The connection between single-photon ionization and the two-color two-photon ionization process used in the measurement is established using the recently developed asymptotic approximation for the complex transition amplitudes of laser-assisted photoionization. We compare and discuss the theoretical and experimental results, especially in the region where strong intershell correlations in the 3s -> kp channel lead to an induced "Cooper" minimum in the 3s ionization cross section.},
  author       = {Guenot, Diego and Klünder, Kathrin and Arnold, Cord and Kroon, David and Dahlstrom, J. M. and Miranda, Miguel and Fordell, Thomas and Gisselbrecht, Mathieu and Johnsson, Per and Mauritsson, Johan and Lindroth, E. and Maquet, A. and Taieb, R. and L'Huillier, Anne and Kheifets, A. S.},
  issn         = {1050-2947},
  language     = {eng},
  number       = {5},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Photoemission-time-delay measurements and calculations close to the 3s-ionization-cross-section minimum in Ar},
  url          = {http://dx.doi.org/10.1103/PhysRevA.85.053424},
  volume       = {85},
  year         = {2012},
}