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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

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

Author

  • Diego Guenot
  • Kathrin Klünder
  • Cord Arnold
  • David Kroon
  • J. M. Dahlstrom
  • Miguel Miranda
  • Thomas Fordell
  • Mathieu Gisselbrecht
  • Per Johnsson
  • Johan Mauritsson
  • E. Lindroth
  • A. Maquet
  • R. Taieb
  • Anne L'Huillier
  • A. S. Kheifets

Summary, in English

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.

Department/s

  • Atomic Physics
  • Synchrotron Radiation Research

Publishing year

2012

Language

English

Publication/Series

Physical Review A (Atomic, Molecular and Optical Physics)

Volume

85

Issue

5

Document type

Journal article

Publisher

American Physical Society

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1050-2947