Multielectron effects in the photoelectron momentum distribution of noble-gas atoms driven by visible-to-infrared-frequency laser pulses: A time-dependent density-functional-theory approach

Mitsuko Murakami, G. P. Zhang, and Shih-I Chu
Phys. Rev. A 95, 053419 – Published 26 May 2017

Abstract

We present the photoelectron momentum distributions (PMDs) of helium, neon, and argon atoms driven by a linearly polarized, visible (527-nm) or near-infrared (800-nm) laser pulse (20 optical cycles in duration) based on the time-dependent density-functional theory (TDDFT) under the local-density approximation with a self-interaction correction. A set of time-dependent Kohn-Sham equations for all electrons in an atom is numerically solved using the generalized pseudospectral method. An effect of the electron-electron interaction driven by a visible laser field is not recognizable in the helium and neon PMDs except for a reduction of the overall photoelectron yield, but there is a clear difference between the PMDs of an argon atom calculated with the frozen-core approximation and TDDFT, indicating an interference of its M-shell wave functions during the ionization. Furthermore, we find that the PMDs of degenerate p states are well separated in intensity when driven by a near-infrared laser field, so that the single-active-electron approximation can be adopted safely.

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  • Received 30 March 2017

DOI:https://doi.org/10.1103/PhysRevA.95.053419

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Mitsuko Murakami1,2,*, G. P. Zhang2, and Shih-I Chu1,3

  • 1Center for Quantum Science and Engineering, Department of Physics, National Taiwan University, Taipei 10617, Taiwan
  • 2Department of Physics, Indiana State University, Terre Haute, Indiana 47809, USA
  • 3Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, USA

  • *mitsuko.murakami@indstate.edu

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Vol. 95, Iss. 5 — May 2017

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