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Macro-atom versus many-electron effects in ultrafast ionization of C 60

Huismans, Y.; Cormier, E.; Cauchy, C.; Hervieux, P. A.; Gademann, G.; Gijsbertsen, A.; Ghafur, O.; Johnsson, P. LU ; Logman, P. and Barillot, T., et al. (2013) In Physical Review A - Atomic, Molecular, and Optical Physics 88(1).
Abstract

Ionization mechanisms of C60 molecules irradiated by a short intense 800-nm laser pulse are studied. Angle-resolved photoelectron spectra show above-threshold ionization (ATI) patterns with a low peak contrast and a remarkably smooth angular distribution. The results are interpreted by combining two theoretical models. A time-dependent Schrödinger equation (TDSE) calculation based on the B-spline method that explicitly takes into account the molecular potential mimics the single-active-electron response while a statistical model accounts for the many-electron effects. We show that the latter are responsible for the loss of contrast in the ATI peaks. The smooth angular distribution arises in the TDSE calculation as a result of... (More)

Ionization mechanisms of C60 molecules irradiated by a short intense 800-nm laser pulse are studied. Angle-resolved photoelectron spectra show above-threshold ionization (ATI) patterns with a low peak contrast and a remarkably smooth angular distribution. The results are interpreted by combining two theoretical models. A time-dependent Schrödinger equation (TDSE) calculation based on the B-spline method that explicitly takes into account the molecular potential mimics the single-active-electron response while a statistical model accounts for the many-electron effects. We show that the latter are responsible for the loss of contrast in the ATI peaks. The smooth angular distribution arises in the TDSE calculation as a result of the high angular momentum of the C60 ground electronic state and therefore is a manifestation of the atomic behavior of the molecule.

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type
Contribution to journal
publication status
published
subject
in
Physical Review A - Atomic, Molecular, and Optical Physics
volume
88
issue
1
publisher
American Physical Society
external identifiers
  • scopus:84880587765
ISSN
1050-2947
DOI
10.1103/PhysRevA.88.013201
language
English
LU publication?
no
id
0167fad1-afbb-4b43-83f4-b5e03eadc309
date added to LUP
2018-06-29 13:48:53
date last changed
2019-05-23 02:20:21
@article{0167fad1-afbb-4b43-83f4-b5e03eadc309,
  abstract     = {<p>Ionization mechanisms of C<sub>60</sub> molecules irradiated by a short intense 800-nm laser pulse are studied. Angle-resolved photoelectron spectra show above-threshold ionization (ATI) patterns with a low peak contrast and a remarkably smooth angular distribution. The results are interpreted by combining two theoretical models. A time-dependent Schrödinger equation (TDSE) calculation based on the B-spline method that explicitly takes into account the molecular potential mimics the single-active-electron response while a statistical model accounts for the many-electron effects. We show that the latter are responsible for the loss of contrast in the ATI peaks. The smooth angular distribution arises in the TDSE calculation as a result of the high angular momentum of the C<sub>60</sub> ground electronic state and therefore is a manifestation of the atomic behavior of the molecule.</p>},
  articleno    = {013201},
  author       = {Huismans, Y. and Cormier, E. and Cauchy, C. and Hervieux, P. A. and Gademann, G. and Gijsbertsen, A. and Ghafur, O. and Johnsson, P. and Logman, P. and Barillot, T. and Bordas, C. and Lépine, F. and Vrakking, M. J.J.},
  issn         = {1050-2947},
  language     = {eng},
  month        = {07},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review A - Atomic, Molecular, and Optical Physics},
  title        = {Macro-atom versus many-electron effects in ultrafast ionization of C <sub>60</sub>},
  url          = {http://dx.doi.org/10.1103/PhysRevA.88.013201},
  volume       = {88},
  year         = {2013},
}