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

Y. Huismans; E. Cormier; C. Cauchy; P. A. Hervieux; G. Gademann; A. Gijsbertsen; O. Ghafur; P. Johnsson; P. Logman; T. Barillot; C. Bordas; F. L??pine; M. J J Vrakking

doi:10.1103/PhysRevA.88.013201

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

Y. Huismans, E. Cormier, C. Cauchy, P. A. Hervieux, G. Gademann, A. Gijsbertsen, O. Ghafur, P. Johnsson, P. Logman, T. Barillot, C. Bordas, F. L??pine, M. J J Vrakking

Chemistry and Pharmaceutical Sciences

Research output: Contribution to Journal › Article › Academic › peer-review

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 Schr¨ odinger equation (TDSE) calculation based on the B-splinemethod 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.

Original language	English
Journal	Physical Review A. Atomic, Molecular and Optical Physics
Volume	88
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.88.013201
Publication status	Published - 3 Jul 2013

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Huismans, Y., Cormier, E., Cauchy, C., Hervieux, P. A., Gademann, G., Gijsbertsen, A., Ghafur, O., Johnsson, P., Logman, P., Barillot, T., Bordas, C., L??pine, F., & Vrakking, M. J. J. (2013). Macro-atom versus many-electron effects in ultrafast ionization of C 60. Physical Review A. Atomic, Molecular and Optical Physics, 88(1). https://doi.org/10.1103/PhysRevA.88.013201

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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 Schr¨ odinger equation (TDSE) calculation based on the B-splinemethod 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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T1 - Macro-atom versus many-electron effects in ultrafast ionization of C 60

AU - Huismans, Y.

AU - Cormier, E.

AU - Cauchy, C.

AU - Hervieux, P. A.

AU - Gademann, G.

AU - Gijsbertsen, A.

AU - Ghafur, O.

AU - Johnsson, P.

AU - Logman, P.

AU - Barillot, T.

AU - Bordas, C.

AU - L??pine, F.

AU - Vrakking, M. J J

PY - 2013/7/3

Y1 - 2013/7/3

N2 - 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 Schr¨ odinger equation (TDSE) calculation based on the B-splinemethod 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.

AB - 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 Schr¨ odinger equation (TDSE) calculation based on the B-splinemethod 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.

U2 - 10.1103/PhysRevA.88.013201

DO - 10.1103/PhysRevA.88.013201

M3 - Article

SN - 1050-2947

VL - 88

JO - Physical Review A. Atomic, Molecular and Optical Physics

JF - Physical Review A. Atomic, Molecular and Optical Physics

IS - 1

ER -

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

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